Splitting PointerTracker into its own project

It's a dev package
fixing a deps issue.
2018-11-06 14:18:53 +00:00 · 2018-11-06 13:50:50 +00:00 · 2018-11-06 13:50:49 +00:00 · 2018-11-06 13:50:49 +00:00 · 2018-11-06 13:50:48 +00:00 · 2018-11-06 13:47:18 +00:00
65 changed files with 2259 additions and 1942 deletions
--- a/codecs/mozjpeg_enc/README.md
+++ b/codecs/mozjpeg_enc/README.md
@@ -39,5 +39,9 @@ struct MozJpegOptions {
  bool trellis_opt_zero;
  bool trellis_opt_table;
  int trellis_loops;
+  bool auto_subsample;
+  int chroma_subsample;
+  bool separate_chroma_quality;
+  int chroma_quality;
 };
 ```
--- a/codecs/mozjpeg_enc/example.html
+++ b/codecs/mozjpeg_enc/example.html
@@ -21,7 +21,7 @@
    console.log('Version:', module.version().toString(16));
    const image = await loadImage('../example.png');
    const result = module.encode(image.data, image.width, image.height, {
-      quality: 40,
+      quality: 75,
      baseline: false,
      arithmetic: false,
      progressive: true,
@@ -29,10 +29,14 @@
      smoothing: 0,
      color_space: 3,
      quant_table: 3,
-      trellis_multipass: true,
-      trellis_opt_zero: true,
-      trellis_opt_table: true,
+      trellis_multipass: false,
+      trellis_opt_zero: false,
+      trellis_opt_table: false,
      trellis_loops: 1,
+      auto_subsample: true,
+      chroma_subsample: 2,
+      separate_chroma_quality: false,
+      chroma_quality: 75,
    });

    const blob = new Blob([result], {type: 'image/jpeg'});
--- a/codecs/mozjpeg_enc/mozjpeg_enc.cpp
+++ b/codecs/mozjpeg_enc/mozjpeg_enc.cpp
@@ -29,6 +29,10 @@ struct MozJpegOptions {
  bool trellis_opt_zero;
  bool trellis_opt_table;
  int trellis_loops;
+  bool auto_subsample;
+  int chroma_subsample;
+  bool separate_chroma_quality;
+  int chroma_quality;
 };

 int version() {
@@ -119,9 +123,6 @@ val encode(std::string image_in, int image_width, int image_height, MozJpegOptio
   */
  jpeg_set_defaults(&cinfo);

-  /* Now you can set any non-default parameters you wish to.
-   * Here we just illustrate the use of quality (quantization table) scaling:
-   */
  jpeg_set_colorspace(&cinfo, (J_COLOR_SPACE) opts.color_space);

  if (opts.quant_table != -1) {
@@ -142,11 +143,23 @@ val encode(std::string image_in, int image_width, int image_height, MozJpegOptio
  jpeg_c_set_bool_param(&cinfo, JBOOLEAN_TRELLIS_Q_OPT, opts.trellis_opt_table);
  jpeg_c_set_int_param(&cinfo, JINT_TRELLIS_NUM_LOOPS, opts.trellis_loops);

+  // A little hacky to build a string for this, but it means we can use set_quality_ratings which
+  // does some useful heuristic stuff.
  std::string quality_str = std::to_string(opts.quality);
+
+  if (opts.separate_chroma_quality && opts.color_space == JCS_YCbCr) {
+    quality_str += "," + std::to_string(opts.chroma_quality);
+  }
+
  char const *pqual = quality_str.c_str();

  set_quality_ratings(&cinfo, (char*) pqual, opts.baseline);

+  if (!opts.auto_subsample && opts.color_space == JCS_YCbCr) {
+    cinfo.comp_info[0].h_samp_factor = opts.chroma_subsample;
+    cinfo.comp_info[0].v_samp_factor = opts.chroma_subsample;
+  }
+
  if (!opts.baseline && opts.progressive) {
    jpeg_simple_progression(&cinfo);
  } else {
@@ -209,6 +222,10 @@ EMSCRIPTEN_BINDINGS(my_module) {
    .field("trellis_opt_zero", &MozJpegOptions::trellis_opt_zero)
    .field("trellis_opt_table", &MozJpegOptions::trellis_opt_table)
    .field("trellis_loops", &MozJpegOptions::trellis_loops)
+    .field("chroma_subsample", &MozJpegOptions::chroma_subsample)
+    .field("auto_subsample", &MozJpegOptions::auto_subsample)
+    .field("separate_chroma_quality", &MozJpegOptions::separate_chroma_quality)
+    .field("chroma_quality", &MozJpegOptions::chroma_quality)
    ;

  function("version", &version);
--- a/codecs/mozjpeg_enc/mozjpeg_enc.js
+++ b/codecs/mozjpeg_enc/mozjpeg_enc.js
--- a/codecs/mozjpeg_enc/mozjpeg_enc.wasm
+++ b/codecs/mozjpeg_enc/mozjpeg_enc.wasm
--- a/package-lock.json
+++ b/package-lock.json
@@ -59,9 +59,9 @@
      "dev": true
    },
    "@types/node": {
-      "version": "9.6.31",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-9.6.31.tgz",
-      "integrity": "sha512-kIVlvUBizL51ALNMPbmcZoM7quHyB7J6fLRwQe22JsMp39nrVSHdBeVVS3fnQCK1orxI3O8LScmb8cuiihkAfA==",
+      "version": "9.6.35",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-9.6.35.tgz",
+      "integrity": "sha512-h5zvHS8wXHGa+Gcqs9K8vqCgOtqjr0+NqG/DDJmQIX1wpR9HivAfgV8bjcD3mGM4bPfQw5Aneb2Pn8355L83jA==",
      "dev": true
    },
    "@types/pretty-bytes": {
@@ -254,9 +254,9 @@
      }
    },
    "@webcomponents/custom-elements": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/@webcomponents/custom-elements/-/custom-elements-1.2.0.tgz",
-      "integrity": "sha512-KegC4y9/xlZNlEcKNtMmKXxNNMMLROzVntX55NfSgMhaXjwNf8EG8ypA2lt20ZQ/LoL0QuGxMZnf3kO5DdQjEQ==",
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/@webcomponents/custom-elements/-/custom-elements-1.2.1.tgz",
+      "integrity": "sha512-flmTp4rVbBkcUIF3eBO3LNoAaYvleTdhPZKzdzr6iztWLLrxCctcK+7MAQeC3/SPjc3JDdC3jYLMRF4R6C3f9g==",
      "dev": true
    },
    "@xtuc/ieee754": {
@@ -339,9 +339,9 @@
      "dev": true
    },
    "ansi-colors": {
-      "version": "3.0.5",
-      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.0.5.tgz",
-      "integrity": "sha512-VVjWpkfaphxUBFarydrQ3n26zX5nIK7hcbT3/ielrvwDDyBBjuh2vuSw1P9zkPq0cfqvdw7lkYHnu+OLSfIBsg==",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.1.0.tgz",
+      "integrity": "sha512-hTv1qPdi+sVEk3jYsdjox5nQI0C9HTbjKShbCdYLKb1LOfNbb7wsF4d7OEKIZoxIHx02tSp3m94jcPW2EfMjmA==",
      "dev": true
    },
    "ansi-escapes": {
@@ -904,67 +904,67 @@
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      "version": "6.13.0",
-      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-async-functions/-/babel-plugin-syntax-async-functions-6.13.0.tgz",
+      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-async-functions/-/babel-plugin-syntax-async-functions-6.13.0.tgz",
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-      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-async-generators/-/babel-plugin-syntax-async-generators-6.13.0.tgz",
+      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-async-generators/-/babel-plugin-syntax-async-generators-6.13.0.tgz",
      "integrity": "sha1-a8lj67FuzLrmuStZbrfzXDQqi5o=",
      "dev": true
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    "babel-plugin-syntax-class-constructor-call": {
      "version": "6.18.0",
-      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-class-constructor-call/-/babel-plugin-syntax-class-constructor-call-6.18.0.tgz",
+      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-class-constructor-call/-/babel-plugin-syntax-class-constructor-call-6.18.0.tgz",
      "integrity": "sha1-nLnTn+Q8hgC+yBRkVt3L1OGnZBY=",
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    "babel-plugin-syntax-class-properties": {
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-      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-class-properties/-/babel-plugin-syntax-class-properties-6.13.0.tgz",
+      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-class-properties/-/babel-plugin-syntax-class-properties-6.13.0.tgz",
      "integrity": "sha1-1+sjt5oxf4VDlixQW4J8fWysJ94=",
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-      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-decorators/-/babel-plugin-syntax-decorators-6.13.0.tgz",
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-      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-jsx/-/babel-plugin-syntax-jsx-6.18.0.tgz",
+      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-jsx/-/babel-plugin-syntax-jsx-6.18.0.tgz",
      "integrity": "sha1-CvMqmm4Tyno/1QaeYtew9Y0NiUY=",
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@@ -1339,9 +1339,9 @@
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+      "resolved": "https://registry.npmjs.org/babel-plugin-transform-react-remove-prop-types/-/babel-plugin-transform-react-remove-prop-types-0.4.19.tgz",
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@@ -1639,7 +1639,6 @@
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@@ -1795,7 +1794,7 @@
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@@ -1832,7 +1831,7 @@
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-      "resolved": "http://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.0.1.tgz",
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@@ -1876,7 +1875,7 @@
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@@ -2604,9 +2603,9 @@
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@@ -2672,7 +2671,7 @@
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@@ -2685,7 +2684,7 @@
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@@ -3139,7 +3138,7 @@
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@@ -3896,6 +3894,12 @@
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@@ -4829,13 +4833,13 @@
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+      "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
      "integrity": "sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==",
      "dev": true,
      "requires": {
@@ -10071,9 +10088,9 @@
      "dev": true
    },
    "sshpk": {
-      "version": "1.14.2",
-      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.14.2.tgz",
-      "integrity": "sha1-xvxhZIo9nE52T9P8306hBeSSupg=",
+      "version": "1.15.1",
+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.15.1.tgz",
+      "integrity": "sha512-mSdgNUaidk+dRU5MhYtN9zebdzF2iG0cNPWy8HG+W8y+fT1JnSkh0fzzpjOa0L7P8i1Rscz38t0h4gPcKz43xA==",
      "dev": true,
      "requires": {
        "asn1": "~0.2.3",
@@ -10330,7 +10347,7 @@
      "dependencies": {
        "rimraf": {
          "version": "2.2.8",
-          "resolved": "http://registry.npmjs.org/rimraf/-/rimraf-2.2.8.tgz",
+          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.2.8.tgz",
          "integrity": "sha1-5Dm+Kq7jJzIZUnMPmaiSnk/FBYI=",
          "dev": true
        }
@@ -10350,7 +10367,7 @@
    },
    "through": {
      "version": "2.3.8",
-      "resolved": "http://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
      "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
      "dev": true
    },
@@ -10455,11 +10472,12 @@
      "dev": true
    },
    "tough-cookie": {
-      "version": "2.3.4",
-      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.3.4.tgz",
-      "integrity": "sha512-TZ6TTfI5NtZnuyy/Kecv+CnoROnyXn2DN97LontgQpCwsX2XyLYCC0ENhYkehSOwAp8rTQKc/NUIF7BkQ5rKLA==",
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.4.3.tgz",
+      "integrity": "sha512-Q5srk/4vDM54WJsJio3XNn6K2sCG+CQ8G5Wz6bZhRZoAe/+TxjWB/GlFAnYEbkYVlON9FMk/fE3h2RLpPXo4lQ==",
      "dev": true,
      "requires": {
+        "psl": "^1.1.24",
        "punycode": "^1.4.1"
      },
      "dependencies": {
@@ -10756,8 +10774,7 @@
      "version": "0.14.5",
      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
-      "dev": true,
-      "optional": true
+      "dev": true
    },
    "type-is": {
      "version": "1.6.16",
@@ -10924,18 +10941,18 @@
      "dev": true
    },
    "unique-filename": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/unique-filename/-/unique-filename-1.1.0.tgz",
-      "integrity": "sha1-0F8v5AMlYIcfMOk8vnNe6iAVFPM=",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/unique-filename/-/unique-filename-1.1.1.tgz",
+      "integrity": "sha512-Vmp0jIp2ln35UTXuryvjzkjGdRyf9b2lTXuSYUiPmzRcl3FDtYqAwOnTJkAngD9SWhnoJzDbTKwaOrZ+STtxNQ==",
      "dev": true,
      "requires": {
        "unique-slug": "^2.0.0"
      }
    },
    "unique-slug": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/unique-slug/-/unique-slug-2.0.0.tgz",
-      "integrity": "sha1-22Z258fMBimHj/GWCXx4hVrp9Ks=",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/unique-slug/-/unique-slug-2.0.1.tgz",
+      "integrity": "sha512-n9cU6+gITaVu7VGj1Z8feKMmfAjEAQGhwD9fE3zvpRRa0wEIx8ODYkVGfSc94M2OX00tUFV8wH3zYbm1I8mxFg==",
      "dev": true,
      "requires": {
        "imurmurhash": "^0.1.4"
@@ -11038,12 +11055,6 @@
        }
      }
    },
-    "url-join": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/url-join/-/url-join-4.0.0.tgz",
-      "integrity": "sha1-TTNA6AfTdzvamZH4MFrNzCpmXSo=",
-      "dev": true
-    },
    "url-parse": {
      "version": "1.4.3",
      "resolved": "https://registry.npmjs.org/url-parse/-/url-parse-1.4.3.tgz",
@@ -11689,17 +11700,14 @@
      }
    },
    "webpack-dev-middleware": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/webpack-dev-middleware/-/webpack-dev-middleware-3.2.0.tgz",
-      "integrity": "sha512-YJLMF/96TpKXaEQwaLEo+Z4NDK8aV133ROF6xp9pe3gQoS7sxfpXh4Rv9eC+8vCvWfmDjRQaMSlRPbO+9G6jgA==",
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/webpack-dev-middleware/-/webpack-dev-middleware-3.4.0.tgz",
+      "integrity": "sha512-Q9Iyc0X9dP9bAsYskAVJ/hmIZZQwf/3Sy4xCAZgL5cUkjZmUZLt4l5HpbST/Pdgjn3u6pE7u5OdGd1apgzRujA==",
      "dev": true,
      "requires": {
-        "loud-rejection": "^1.6.0",
        "memory-fs": "~0.4.1",
        "mime": "^2.3.1",
-        "path-is-absolute": "^1.0.0",
        "range-parser": "^1.0.3",
-        "url-join": "^4.0.0",
        "webpack-log": "^2.0.0"
      },
      "dependencies": {
@@ -11712,9 +11720,9 @@
      }
    },
    "webpack-dev-server": {
-      "version": "3.1.8",
-      "resolved": "https://registry.npmjs.org/webpack-dev-server/-/webpack-dev-server-3.1.8.tgz",
-      "integrity": "sha512-c+tcJtDqnPdxCAzEEZKdIPmg3i5i7cAHe+B+0xFNK0BlCc2HF/unYccbU7xTgfGc5xxhCztCQzFmsqim+KhI+A==",
+      "version": "3.1.9",
+      "resolved": "https://registry.npmjs.org/webpack-dev-server/-/webpack-dev-server-3.1.9.tgz",
+      "integrity": "sha512-fqPkuNalLuc/hRC2QMkVYJkgNmRvxZQo7ykA2e1XRg/tMJm3qY7ZaD6d89/Fqjxtj9bOrn5wZzLD2n84lJdvWg==",
      "dev": true,
      "requires": {
        "ansi-html": "0.0.7",
@@ -11742,7 +11750,7 @@
        "spdy": "^3.4.1",
        "strip-ansi": "^3.0.0",
        "supports-color": "^5.1.0",
-        "webpack-dev-middleware": "3.2.0",
+        "webpack-dev-middleware": "3.4.0",
        "webpack-log": "^2.0.0",
        "yargs": "12.0.2"
      },
@@ -11795,9 +11803,9 @@
          }
        },
        "debug": {
-          "version": "3.2.5",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.5.tgz",
-          "integrity": "sha512-D61LaDQPQkxJ5AUM2mbSJRbPkNs/TmdmOeLAi1hgDkpDfIfetSrjmWhccwtuResSwMbACjx/xXQofvM9CE/aeg==",
+          "version": "3.2.6",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
+          "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
          "dev": true,
          "requires": {
            "ms": "^2.1.1"
@@ -12122,7 +12130,7 @@
    },
    "wrap-ansi": {
      "version": "2.1.0",
-      "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
      "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
      "dev": true,
      "requires": {
@@ -12518,7 +12526,7 @@
        },
        "minimist": {
          "version": "1.2.0",
-          "resolved": "http://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
          "dev": true
        },
--- a/package.json
+++ b/package.json
@@ -15,10 +15,10 @@
    }
  },
  "devDependencies": {
-    "@types/node": "^9.6.23",
+    "@types/node": "^9.6.35",
    "@types/pretty-bytes": "^5.1.0",
    "@types/webassembly-js-api": "0.0.1",
-    "@webcomponents/custom-elements": "^1.2.0",
+    "@webcomponents/custom-elements": "^1.2.1",
    "babel-loader": "^7.1.5",
    "babel-plugin-jsx-pragmatic": "^1.0.2",
    "babel-plugin-syntax-dynamic-import": "^6.18.0",
@@ -27,21 +27,28 @@
    "babel-plugin-transform-object-rest-spread": "^6.26.0",
    "babel-plugin-transform-react-constant-elements": "^6.23.0",
    "babel-plugin-transform-react-jsx": "^6.24.1",
-    "babel-plugin-transform-react-remove-prop-types": "^0.4.14",
+    "babel-plugin-transform-react-remove-prop-types": "^0.4.19",
    "babel-preset-env": "^1.7.0",
    "babel-register": "^6.26.0",
+    "classnames": "^2.2.6",
    "clean-webpack-plugin": "^0.1.19",
-    "copy-webpack-plugin": "^4.5.2",
+    "comlink": "^3.0.3",
+    "copy-webpack-plugin": "^4.5.3",
    "css-loader": "^0.28.11",
    "exports-loader": "^0.7.0",
+    "file-drop-element": "0.0.7",
    "file-loader": "^1.1.11",
    "html-webpack-plugin": "^3.2.0",
-    "husky": "^1.0.0-rc.13",
+    "husky": "^1.1.2",
    "if-env": "^1.0.4",
+    "linkstate": "^1.1.1",
    "loader-utils": "^1.1.0",
    "mini-css-extract-plugin": "^0.3.0",
-    "node-sass": "^4.9.3",
+    "node-sass": "^4.9.4",
    "optimize-css-assets-webpack-plugin": "^4.0.3",
+    "pointer-tracker": "^2.0.3",
+    "preact": "^8.3.1",
+    "pretty-bytes": "^5.1.0",
    "progress-bar-webpack-plugin": "^1.11.0",
    "raw-loader": "^0.5.1",
    "sass-loader": "^7.1.0",
@@ -55,16 +62,11 @@
    "tslint-react": "^3.6.0",
    "typescript": "^2.9.2",
    "typings-for-css-modules-loader": "^1.7.0",
-    "webpack": "^4.19.1",
+    "webpack": "=4.19.1",
    "webpack-bundle-analyzer": "^2.13.1",
    "webpack-cli": "^2.1.5",
    "webpack-dev-server": "^3.1.5",
    "webpack-plugin-replace": "^1.1.1",
-    "classnames": "^2.2.6",
-    "comlink": "^3.0.3",
-    "linkstate": "^1.1.1",
-    "preact": "^8.3.1",
-    "pretty-bytes": "^5.1.0",
    "worker-plugin": "^1.1.1"
  }
 }
--- a/src/codecs/browser-jpeg/encoder-meta.ts
+++ b/src/codecs/browser-jpeg/encoder-meta.ts
@@ -5,4 +5,4 @@ export const type = 'browser-jpeg';
 export const label = 'Browser JPEG';
 export const mimeType = 'image/jpeg';
 export const extension = 'jpg';
-export const defaultOptions: EncodeOptions = { quality: 0.5 };
+export const defaultOptions: EncodeOptions = { quality: 0.75 };
--- a/src/codecs/browser-jpeg/options.ts
+++ b/src/codecs/browser-jpeg/options.ts
@@ -1,3 +1,3 @@
 import qualityOption from '../generic/quality-option';

-export default qualityOption({ min: 0, max: 1, step: 0 });
+export default qualityOption({ min: 0, max: 1, step: 0.01 });
--- a/src/codecs/browser-webp/encoder-meta.ts
+++ b/src/codecs/browser-webp/encoder-meta.ts
@@ -7,5 +7,5 @@ export const type = 'browser-webp';
 export const label = 'Browser WebP';
 export const mimeType = 'image/webp';
 export const extension = 'webp';
-export const defaultOptions: EncodeOptions = { quality: 0.5 };
+export const defaultOptions: EncodeOptions = { quality: 0.75 };
 export const featureTest = () => canvasEncodeTest(mimeType);
--- a/src/codecs/browser-webp/options.ts
+++ b/src/codecs/browser-webp/options.ts
@@ -1,3 +1,3 @@
 import qualityOption from '../generic/quality-option';

-export default qualityOption({ min: 0, max: 1, step: 0 });
+export default qualityOption({ min: 0, max: 1, step: 0.01 });
--- a/src/codecs/generic/quality-option.tsx
+++ b/src/codecs/generic/quality-option.tsx
@@ -1,6 +1,7 @@
 import { h, Component } from 'preact';
 import { bind } from '../../lib/initial-util';
-import '../../custom-els/RangeInput';
+import * as style from '../../components/Options/style.scss';
+import Range from '../../components/range';

 interface EncodeOptions {
  quality: number;
@@ -33,18 +34,19 @@ export default function qualityOption(opts: QualityOptionArg = {}) {

    render({ options }: Props) {
      return (
-        <div>
-          <label>
-            Quality:
-            <range-input
+        <div class={style.optionsSection}>
+          <div class={style.optionOneCell}>
+            <Range
              name="quality"
              min={min}
              max={max}
              step={step || 'any'}
-              value={'' + options.quality}
-              onChange={this.onChange}
-            />
-          </label>
+              value={options.quality}
+              onInput={this.onChange}
+            >
+              Quality:
+            </Range>
+          </div>
        </div>
      );
    }
--- a/src/codecs/imagequant/options.tsx
+++ b/src/codecs/imagequant/options.tsx
@@ -2,6 +2,10 @@ import { h, Component } from 'preact';
 import { bind } from '../../lib/initial-util';
 import { inputFieldValueAsNumber, konami } from '../../lib/util';
 import { QuantizeOptions } from './processor-meta';
+import * as style from '../../components/Options/style.scss';
+import Expander from '../../components/expander';
+import Select from '../../components/select';
+import Range from '../../components/range';

 const konamiPromise = konami();

@@ -26,50 +30,61 @@ export default class QuantizerOptions extends Component<Props, State> {
  @bind
  onChange(event: Event) {
    const form = (event.currentTarget as HTMLInputElement).closest('form') as HTMLFormElement;
+    const { options } = this.props;

-    const options: QuantizeOptions = {
-      zx: inputFieldValueAsNumber(form.zx),
-      maxNumColors: inputFieldValueAsNumber(form.maxNumColors),
+    const newOptions: QuantizeOptions = {
+      zx: inputFieldValueAsNumber(form.zx, options.zx),
+      maxNumColors: inputFieldValueAsNumber(form.maxNumColors, options.maxNumColors),
      dither: inputFieldValueAsNumber(form.dither),
    };
-    this.props.onChange(options);
+    this.props.onChange(newOptions);
  }

  render({ options }: Props, { extendedSettings }: State) {
    return (
-      <form>
-        <label style={{ display: extendedSettings ? '' : 'none' }}>
-          Type:
-          <select
-            name="zx"
-            value={'' + options.zx}
-            onChange={this.onChange}
-          >
-            <option value="0">Standard</option>
-            <option value="1">ZX</option>
-          </select>
-        </label>
-        <label style={{ display: options.zx ? 'none' : '' }}>
-          Palette Colors:
-          <range-input
-            name="maxNumColors"
-            min="2"
-            max="256"
-            value={'' + options.maxNumColors}
-            onChange={this.onChange}
-          />
-        </label>
-        <label>
-          Dithering:
-          <range-input
+      <form class={style.optionsSection}>
+        <Expander>
+          {extendedSettings ?
+            <label class={style.optionTextFirst}>
+              Type:
+              <Select
+                name="zx"
+                value={'' + options.zx}
+                onChange={this.onChange}
+              >
+                <option value="0">Standard</option>
+                <option value="1">ZX</option>
+              </Select>
+            </label>
+          : null}
+        </Expander>
+        <Expander>
+          {options.zx ? null :
+            <div class={style.optionOneCell}>
+              <Range
+                name="maxNumColors"
+                min="2"
+                max="256"
+                value={options.maxNumColors}
+                onInput={this.onChange}
+              >
+                Colors:
+              </Range>
+            </div>
+          }
+        </Expander>
+        <div class={style.optionOneCell}>
+          <Range
            name="dither"
            min="0"
            max="1"
            step="0.01"
-            value={'' + options.dither}
-            onChange={this.onChange}
-          />
-        </label>
+            value={options.dither}
+            onInput={this.onChange}
+          >
+            Dithering:
+          </Range>
+        </div>
      </form>
    );
  }
--- a/src/codecs/mozjpeg/encoder-meta.ts
+++ b/src/codecs/mozjpeg/encoder-meta.ts
@@ -17,6 +17,10 @@ export interface EncodeOptions {
  trellis_opt_zero: boolean;
  trellis_opt_table: boolean;
  trellis_loops: number;
+  auto_subsample: boolean;
+  chroma_subsample: number;
+  separate_chroma_quality: boolean;
+  chroma_quality: number;
 }

 export interface EncoderState { type: typeof type; options: EncodeOptions; }
@@ -38,4 +42,8 @@ export const defaultOptions: EncodeOptions = {
  trellis_opt_zero: false,
  trellis_opt_table: false,
  trellis_loops: 1,
+  auto_subsample: true,
+  chroma_subsample: 2,
+  separate_chroma_quality: false,
+  chroma_quality: 75,
 };
--- a/src/codecs/mozjpeg/options.tsx
+++ b/src/codecs/mozjpeg/options.tsx
@@ -2,158 +2,256 @@ import { h, Component } from 'preact';
 import { bind } from '../../lib/initial-util';
 import { inputFieldChecked, inputFieldValueAsNumber } from '../../lib/util';
 import { EncodeOptions, MozJpegColorSpace } from './encoder-meta';
-import '../../custom-els/RangeInput';
+import * as style from '../../components/Options/style.scss';
+import Checkbox from '../../components/checkbox';
+import Expander from '../../components/expander';
+import Select from '../../components/select';
+import Range from '../../components/range';
+import linkState from 'linkstate';

-type Props = {
-  options: EncodeOptions,
-  onChange(newOptions: EncodeOptions): void,
-};
+interface Props {
+  options: EncodeOptions;
+  onChange(newOptions: EncodeOptions): void;
+}
+
+interface State {
+  showAdvanced: boolean;
+}
+
+export default class MozJPEGEncoderOptions extends Component<Props, State> {
+  state: State = {
+    showAdvanced: false,
+  };

-export default class MozJPEGEncoderOptions extends Component<Props, {}> {
  @bind
  onChange(event: Event) {
    const form = (event.currentTarget as HTMLInputElement).closest('form') as HTMLFormElement;
+    const { options } = this.props;

-    const options: EncodeOptions = {
+    const newOptions: EncodeOptions = {
      // Copy over options the form doesn't currently care about, eg arithmetic
      ...this.props.options,
      // And now stuff from the form:
      // .checked
-      baseline: inputFieldChecked(form.baseline),
-      progressive: inputFieldChecked(form.progressive),
-      optimize_coding: inputFieldChecked(form.optimize_coding),
-      trellis_multipass: inputFieldChecked(form.trellis_multipass),
-      trellis_opt_zero: inputFieldChecked(form.trellis_opt_zero),
-      trellis_opt_table: inputFieldChecked(form.trellis_opt_table),
+      baseline: inputFieldChecked(form.baseline, options.baseline),
+      progressive: inputFieldChecked(form.progressive, options.progressive),
+      optimize_coding: inputFieldChecked(form.optimize_coding, options.optimize_coding),
+      trellis_multipass: inputFieldChecked(form.trellis_multipass, options.trellis_multipass),
+      trellis_opt_zero: inputFieldChecked(form.trellis_opt_zero, options.trellis_opt_zero),
+      trellis_opt_table: inputFieldChecked(form.trellis_opt_table, options.trellis_opt_table),
+      auto_subsample: inputFieldChecked(form.auto_subsample, options.auto_subsample),
+      separate_chroma_quality:
+        inputFieldChecked(form.separate_chroma_quality, options.separate_chroma_quality),
      // .value
-      quality: inputFieldValueAsNumber(form.quality),
-      smoothing: inputFieldValueAsNumber(form.smoothing),
-      color_space: inputFieldValueAsNumber(form.color_space),
-      quant_table: inputFieldValueAsNumber(form.quant_table),
-      trellis_loops: inputFieldValueAsNumber(form.trellis_loops),
+      quality: inputFieldValueAsNumber(form.quality, options.quality),
+      chroma_quality: inputFieldValueAsNumber(form.chroma_quality, options.chroma_quality),
+      chroma_subsample: inputFieldValueAsNumber(form.chroma_subsample, options.chroma_subsample),
+      smoothing: inputFieldValueAsNumber(form.smoothing, options.smoothing),
+      color_space: inputFieldValueAsNumber(form.color_space, options.color_space),
+      quant_table: inputFieldValueAsNumber(form.quant_table, options.quant_table),
+      trellis_loops: inputFieldValueAsNumber(form.trellis_loops, options.trellis_loops),
    };
-    this.props.onChange(options);
+    this.props.onChange(newOptions);
  }

-  render({ options }: Props) {
+  render({ options }: Props, { showAdvanced }: State) {
    // I'm rendering both lossy and lossless forms, as it becomes much easier when
    // gathering the data.
    return (
-      <form>
-        <label>
-          Quality:
-          <range-input
+      <form class={style.optionsSection}>
+        <div class={style.optionOneCell}>
+          <Range
            name="quality"
            min="0"
            max="100"
-            value={'' + options.quality}
-            onChange={this.onChange}
-          />
-        </label>
-        <label>
-          <input
-            name="baseline"
-            type="checkbox"
-            checked={options.baseline}
-            onChange={this.onChange}
-          />
-          <span>Baseline (worse but legacy-compatible)</span>
-        </label>
-        <label style={{ display: options.baseline ? 'none' : '' }}>
-          <input
-            name="progressive"
-            type="checkbox"
-            checked={options.progressive}
-            onChange={this.onChange}
-          />
-          <span>Progressive multi-pass rendering</span>
-        </label>
-        <label style={{ display: options.baseline ? '' : 'none' }}>
-          <input
-            name="optimize_coding"
-            type="checkbox"
-            checked={options.optimize_coding}
-            onChange={this.onChange}
-          />
-          <span>Optimize Huffman table</span>
-        </label>
-        <label>
-          Smoothing:
-          <range-input
-            name="smoothing"
-            min="0"
-            max="100"
-            value={'' + options.smoothing}
-            onChange={this.onChange}
-          />
-        </label>
-        <label>
-          Output color space:
-          <select
-            name="color_space"
-            value={'' + options.color_space}
-            onChange={this.onChange}
+            value={options.quality}
+            onInput={this.onChange}
          >
-            <option value={MozJpegColorSpace.GRAYSCALE}>Grayscale</option>
-            <option value={MozJpegColorSpace.RGB}>RGB (sub-optimal)</option>
-            <option value={MozJpegColorSpace.YCbCr}>YCbCr (optimized for color)</option>
-          </select>
-        </label>
-        <label>
-          Quantization table:
-          <select
-            name="quant_table"
-            value={'' + options.quant_table}
-            onChange={this.onChange}
-          >
-            <option value="0">JPEG Annex K</option>
-            <option value="1">Flat</option>
-            <option value="2">MSSIM-tuned Kodak</option>
-            <option value="3">ImageMagick</option>
-            <option value="4">PSNR-HVS-M-tuned Kodak</option>
-            <option value="5">Klein et al</option>
-            <option value="6">Watson et al</option>
-            <option value="7">Ahumada et al</option>
-            <option value="8">Peterson et al</option>
-          </select>
-        </label>
-        <label>
-          <input
-            name="trellis_multipass"
-            type="checkbox"
-            checked={options.trellis_multipass}
-            onChange={this.onChange}
-          />
-          <span>Consider multiple scans during trellis quantization</span>
-        </label>
-        <label style={{ display: options.trellis_multipass ? '' : 'none' }}>
-          <input
-            name="trellis_opt_zero"
-            type="checkbox"
-            checked={options.trellis_opt_zero}
-            onChange={this.onChange}
-          />
-          <span>Optimize runs of zero blocks</span>
-        </label>
-        <label>
-          <input
-            name="trellis_opt_table"
-            type="checkbox"
-            checked={options.trellis_opt_table}
-            onChange={this.onChange}
-          />
-          <span>Optimize after trellis quantization</span>
-        </label>
-        <label>
-          Trellis quantization passes:
-          <range-input
-            name="trellis_loops"
-            min="1"
-            max="50"
-            value={'' + options.trellis_loops}
-            onChange={this.onChange}
+            Quality:
+          </Range>
+        </div>
+        <label class={style.optionInputFirst}>
+          <Checkbox
+            checked={showAdvanced}
+            onChange={linkState(this, 'showAdvanced')}
          />
+          Show advanced settings
        </label>
+        <Expander>
+          {showAdvanced ?
+            <div>
+              <label class={style.optionTextFirst}>
+                Channels:
+                <Select
+                  name="color_space"
+                  value={options.color_space}
+                  onChange={this.onChange}
+                >
+                  <option value={MozJpegColorSpace.GRAYSCALE}>Grayscale</option>
+                  <option value={MozJpegColorSpace.RGB}>RGB</option>
+                  <option value={MozJpegColorSpace.YCbCr}>YCbCr</option>
+                </Select>
+              </label>
+              <Expander>
+                {options.color_space === MozJpegColorSpace.YCbCr ?
+                  <div>
+                    <label class={style.optionInputFirst}>
+                      <Checkbox
+                        name="auto_subsample"
+                        checked={options.auto_subsample}
+                        onChange={this.onChange}
+                      />
+                      Auto subsample chroma
+                    </label>
+                    <Expander>
+                      {options.auto_subsample ? null :
+                        <div class={style.optionOneCell}>
+                          <Range
+                            name="chroma_subsample"
+                            min="1"
+                            max="4"
+                            value={options.chroma_subsample}
+                            onInput={this.onChange}
+                          >
+                            Subsample chroma by:
+                          </Range>
+                        </div>
+                      }
+                    </Expander>
+                    <label class={style.optionInputFirst}>
+                      <Checkbox
+                        name="separate_chroma_quality"
+                        checked={options.separate_chroma_quality}
+                        onChange={this.onChange}
+                      />
+                      Separate chroma quality
+                    </label>
+                    <Expander>
+                      {options.separate_chroma_quality ?
+                        <div class={style.optionOneCell}>
+                          <Range
+                            name="chroma_quality"
+                            min="0"
+                            max="100"
+                            value={options.chroma_quality}
+                            onInput={this.onChange}
+                          >
+                            Chroma quality:
+                          </Range>
+                        </div>
+                        : null
+                      }
+                    </Expander>
+                  </div>
+                  : null
+                }
+              </Expander>
+              <label class={style.optionInputFirst}>
+                <Checkbox
+                  name="baseline"
+                  checked={options.baseline}
+                  onChange={this.onChange}
+                />
+                Pointless spec compliance
+              </label>
+              <Expander>
+                {options.baseline ? null :
+                  <label class={style.optionInputFirst}>
+                    <Checkbox
+                      name="progressive"
+                      checked={options.progressive}
+                      onChange={this.onChange}
+                    />
+                    Progressive rendering
+                  </label>
+                }
+              </Expander>
+              <Expander>
+                {options.baseline ?
+                  <label class={style.optionInputFirst}>
+                    <Checkbox
+                      name="optimize_coding"
+                      checked={options.optimize_coding}
+                      onChange={this.onChange}
+                    />
+                    Optimize Huffman table
+                  </label>
+                  : null
+                }
+              </Expander>
+              <div class={style.optionOneCell}>
+                <Range
+                  name="smoothing"
+                  min="0"
+                  max="100"
+                  value={options.smoothing}
+                  onInput={this.onChange}
+                >
+                  Smoothing:
+                </Range>
+              </div>
+              <label class={style.optionTextFirst}>
+                Quantization:
+                <Select
+                  name="quant_table"
+                  value={options.quant_table}
+                  onChange={this.onChange}
+                >
+                  <option value="0">JPEG Annex K</option>
+                  <option value="1">Flat</option>
+                  <option value="2">MSSIM-tuned Kodak</option>
+                  <option value="3">ImageMagick</option>
+                  <option value="4">PSNR-HVS-M-tuned Kodak</option>
+                  <option value="5">Klein et al</option>
+                  <option value="6">Watson et al</option>
+                  <option value="7">Ahumada et al</option>
+                  <option value="8">Peterson et al</option>
+                </Select>
+              </label>
+              <label class={style.optionInputFirst}>
+                <Checkbox
+                  name="trellis_multipass"
+                  checked={options.trellis_multipass}
+                  onChange={this.onChange}
+                />
+                Trellis multipass
+              </label>
+              <Expander>
+                {options.trellis_multipass ?
+                  <label class={style.optionInputFirst}>
+                    <Checkbox
+                      name="trellis_opt_zero"
+                      checked={options.trellis_opt_zero}
+                      onChange={this.onChange}
+                    />
+                    Optimize zero block runs
+                  </label>
+                  : null
+                }
+              </Expander>
+              <label class={style.optionInputFirst}>
+                <Checkbox
+                  name="trellis_opt_table"
+                  checked={options.trellis_opt_table}
+                  onChange={this.onChange}
+                />
+                Optimize after trellis quantization
+              </label>
+              <div class={style.optionOneCell}>
+                <Range
+                  name="trellis_loops"
+                  min="1"
+                  max="50"
+                  value={options.trellis_loops}
+                  onInput={this.onChange}
+                >
+                  Trellis quantization passes:
+                </Range>
+              </div>
+            </div>
+            : null
+          }
+        </Expander>
      </form>
    );
  }
--- a/src/codecs/optipng/options.tsx
+++ b/src/codecs/optipng/options.tsx
@@ -2,6 +2,8 @@ import { h, Component } from 'preact';
 import { bind } from '../../lib/initial-util';
 import { inputFieldValueAsNumber } from '../../lib/util';
 import { EncodeOptions } from './encoder-meta';
+import Range from '../../components/range';
+import * as style from '../../components/Options/style.scss';

 type Props = {
  options: EncodeOptions;
@@ -21,19 +23,19 @@ export default class OptiPNGEncoderOptions extends Component<Props, {}> {

  render({ options }: Props) {
    return (
-      <form>
-        <label>
-          Effort:
-          <input
+      <form class={style.optionsSection}>
+        <div class={style.optionOneCell}>
+          <Range
            name="level"
-            type="range"
            min="0"
            max="7"
            step="1"
-            value={'' + options.level}
-            onChange={this.onChange}
-          />
-        </label>
+            value={options.level}
+            onInput={this.onChange}
+          >
+            Effort:
+          </Range>
+        </div>
      </form>
    );
  }
--- a/src/codecs/processor.ts
+++ b/src/codecs/processor.ts
@@ -92,7 +92,6 @@ export default class Processor {
    // If the worker is unused for 10 seconds, remove it to save memory.
    this._workerTimeoutId = self.setTimeout(
      () => {
-        if (this._busy) throw Error("Worker shouldn't be busy");
        if (!this._worker) return;
        this._worker.terminate();
        this._worker = undefined;
@@ -104,14 +103,14 @@ export default class Processor {
  /** Abort the current job, if any */
  abortCurrent() {
    if (!this._busy) return;
-    if (!this._worker || !this._abortRejector) {
-      throw Error("There must be a worker/rejector if it's busy");
-    }
+    if (!this._abortRejector) throw Error("There must be a rejector if it's busy");
    this._abortRejector(new DOMException('Aborted', 'AbortError'));
-    this._worker.terminate();
-    this._worker = undefined;
    this._abortRejector = undefined;
    this._busy = false;
+
+    if (!this._worker) return;
+    this._worker.terminate();
+    this._worker = undefined;
  }

  // Off main thread jobs:
--- a/src/codecs/resize/options.tsx
+++ b/src/codecs/resize/options.tsx
@@ -1,8 +1,12 @@
 import { h, Component } from 'preact';
 import linkState from 'linkstate';
-import { bind } from '../../lib/initial-util';
-import { inputFieldValueAsNumber } from '../../lib/util';
+import { bind, linkRef } from '../../lib/initial-util';
+import { inputFieldValueAsNumber, inputFieldValue } from '../../lib/util';
 import { ResizeOptions } from './processor-meta';
+import * as style from '../../components/Options/style.scss';
+import Checkbox from '../../components/checkbox';
+import Expander from '../../components/expander';
+import Select from '../../components/select';

 interface Props {
  isVector: Boolean;
@@ -22,23 +26,26 @@ export default class ResizerOptions extends Component<Props, State> {

  form?: HTMLFormElement;

-  reportOptions() {
-    const width = this.form!.width as HTMLInputElement;
-    const height = this.form!.height as HTMLInputElement;
+  private reportOptions() {
+    const form = this.form!;
+    const width = form.width as HTMLInputElement;
+    const height = form.height as HTMLInputElement;
+    const { options } = this.props;

    if (!width.checkValidity() || !height.checkValidity()) return;

-    const options: ResizeOptions = {
+    const newOptions: ResizeOptions = {
      width: inputFieldValueAsNumber(width),
      height: inputFieldValueAsNumber(height),
-      method: this.form!.resizeMethod.value,
-      fitMethod: this.form!.fitMethod.value,
+      method: form.resizeMethod.value,
+      // Casting, as the formfield only returns the correct values.
+      fitMethod: inputFieldValue(form.fitMethod, options.fitMethod) as ResizeOptions['fitMethod'],
    };
-    this.props.onChange(options);
+    this.props.onChange(newOptions);
  }

  @bind
-  onChange(event: Event) {
+  private onChange() {
    this.reportOptions();
  }

@@ -50,27 +57,31 @@ export default class ResizerOptions extends Component<Props, State> {
  }

  @bind
-  onWidthInput(event: Event) {
-    if (!this.state.maintainAspect) return;
+  private onWidthInput() {
+    if (this.state.maintainAspect) {
+      const width = inputFieldValueAsNumber(this.form!.width);
+      this.form!.height.value = Math.round(width / this.props.aspect);
+    }

-    const width = inputFieldValueAsNumber(this.form!.width);
-    this.form!.height.value = Math.round(width / this.props.aspect);
+    this.reportOptions();
  }

  @bind
-  onHeightInput(event: Event) {
-    if (!this.state.maintainAspect) return;
+  private onHeightInput() {
+    if (this.state.maintainAspect) {
+      const height = inputFieldValueAsNumber(this.form!.height);
+      this.form!.width.value = Math.round(height * this.props.aspect);
+    }

-    const height = inputFieldValueAsNumber(this.form!.height);
-    this.form!.width.value = Math.round(height * this.props.aspect);
+    this.reportOptions();
  }

-  render({ options, aspect, isVector }: Props, { maintainAspect }: State) {
+  render({ options, isVector }: Props, { maintainAspect }: State) {
    return (
-      <form ref={el => this.form = el}>
-        <label>
+      <form ref={linkRef(this, 'form')} class={style.optionsSection}>
+        <label class={style.optionTextFirst}>
          Method:
-          <select
+          <Select
            name="resizeMethod"
            value={options.method}
            onChange={this.onChange}
@@ -80,51 +91,55 @@ export default class ResizerOptions extends Component<Props, State> {
            <option value="browser-low">Browser low quality</option>
            <option value="browser-medium">Browser medium quality</option>
            <option value="browser-high">Browser high quality</option>
-          </select>
+          </Select>
        </label>
-        <label>
+        <label class={style.optionTextFirst}>
          Width:
          <input
            required
+            class={style.textField}
            name="width"
            type="number"
            min="1"
            value={'' + options.width}
-            onChange={this.onChange}
            onInput={this.onWidthInput}
          />
        </label>
-        <label>
+        <label class={style.optionTextFirst}>
          Height:
          <input
            required
+            class={style.textField}
            name="height"
            type="number"
            min="1"
            value={'' + options.height}
-            onChange={this.onChange}
+            onInput={this.onHeightInput}
          />
        </label>
-        <label>
-          <input
+        <label class={style.optionInputFirst}>
+          <Checkbox
            name="maintainAspect"
-            type="checkbox"
            checked={maintainAspect}
            onChange={linkState(this, 'maintainAspect')}
          />
          Maintain aspect ratio
        </label>
-        <label style={{ display: maintainAspect ? 'none' : '' }}>
-          Fit method:
-          <select
-            name="fitMethod"
-            value={options.fitMethod}
-            onChange={this.onChange}
-          >
-            <option value="stretch">Stretch</option>
-            <option value="cover">Cover</option>
-          </select>
-        </label>
+        <Expander>
+          {maintainAspect ? null :
+            <label class={style.optionTextFirst}>
+              Fit method:
+              <Select
+                name="fitMethod"
+                value={options.fitMethod}
+                onChange={this.onChange}
+              >
+                <option value="stretch">Stretch</option>
+                <option value="cover">Cover</option>
+              </Select>
+            </label>
+          }
+        </Expander>
      </form>
    );
  }
--- a/src/codecs/webp/options.tsx
+++ b/src/codecs/webp/options.tsx
@@ -2,13 +2,21 @@ import { h, Component } from 'preact';
 import { bind } from '../../lib/initial-util';
 import { inputFieldCheckedAsNumber, inputFieldValueAsNumber } from '../../lib/util';
 import { EncodeOptions, WebPImageHint } from './encoder-meta';
-import * as styles from './styles.scss';
-import '../../custom-els/RangeInput';
+import * as style from '../../components/Options/style.scss';
+import Checkbox from '../../components/checkbox';
+import Expander from '../../components/expander';
+import Select from '../../components/select';
+import Range from '../../components/range';
+import linkState from 'linkstate';

-type Props = {
-  options: EncodeOptions,
-  onChange(newOptions: EncodeOptions): void,
-};
+interface Props {
+  options: EncodeOptions;
+  onChange(newOptions: EncodeOptions): void;
+}
+
+interface State {
+  showAdvanced: boolean;
+}

 // From kLosslessPresets in config_enc.c
 // The format is [method, quality].
@@ -18,257 +26,291 @@ const losslessPresets:[number, number][] = [
 ];
 const losslessPresetDefault = 6;

-function determineLosslessQuality(quality: number): number {
-  const index = losslessPresets.findIndex(item => item[1] === quality);
+function determineLosslessQuality(quality: number, method: number): number {
+  const index = losslessPresets.findIndex(
+    ([presetMethod, presetQuality]) => presetMethod === method && presetQuality === quality,
+  );
  if (index !== -1) return index;
  // Quality doesn't match one of the presets.
  // This can happen when toggling 'lossless'.
  return losslessPresetDefault;
 }

-export default class WebPEncoderOptions extends Component<Props, {}> {
+export default class WebPEncoderOptions extends Component<Props, State> {
+  state: State = {
+    showAdvanced: false,
+  };
+
  @bind
  onChange(event: Event) {
    const form = (event.currentTarget as HTMLInputElement).closest('form') as HTMLFormElement;
    const lossless = inputFieldCheckedAsNumber(form.lossless);
-    const losslessPresetInput = (form.lossless_preset as HTMLInputElement);
+    const { options } = this.props;
+    const losslessPresetValue = inputFieldValueAsNumber(
+      form.lossless_preset, determineLosslessQuality(options.quality, options.method),
+    );

-    const options: EncodeOptions = {
+    const newOptions: EncodeOptions = {
      // Copy over options the form doesn't care about, eg emulate_jpeg_size
-      ...this.props.options,
+      ...options,
      // And now stuff from the form:
      lossless,
      // Special-cased inputs:
      // In lossless mode, the quality is derived from the preset.
      quality: lossless ?
-        losslessPresets[Number(losslessPresetInput.value)][1] :
-        inputFieldValueAsNumber(form.quality),
+        losslessPresets[losslessPresetValue][1] :
+        inputFieldValueAsNumber(form.quality, options.quality),
      // In lossless mode, the method is derived from the preset.
      method: lossless ?
-        losslessPresets[Number(losslessPresetInput.value)][0] :
-        inputFieldValueAsNumber(form.method_input),
-      image_hint: (form.image_hint as HTMLInputElement).checked ?
+        losslessPresets[losslessPresetValue][0] :
+        inputFieldValueAsNumber(form.method_input, options.method),
+      image_hint: inputFieldCheckedAsNumber(form.image_hint, options.image_hint) ?
        WebPImageHint.WEBP_HINT_GRAPH :
        WebPImageHint.WEBP_HINT_DEFAULT,
      // .checked
-      exact: inputFieldCheckedAsNumber(form.exact),
-      alpha_compression: inputFieldCheckedAsNumber(form.alpha_compression),
-      autofilter: inputFieldCheckedAsNumber(form.autofilter),
-      filter_type: inputFieldCheckedAsNumber(form.filter_type),
-      use_sharp_yuv: inputFieldCheckedAsNumber(form.use_sharp_yuv),
+      exact: inputFieldCheckedAsNumber(form.exact, options.exact),
+      alpha_compression: inputFieldCheckedAsNumber(
+        form.alpha_compression, options.alpha_compression,
+      ),
+      autofilter: inputFieldCheckedAsNumber(form.autofilter, options.autofilter),
+      filter_type: inputFieldCheckedAsNumber(form.filter_type, options.filter_type),
+      use_sharp_yuv: inputFieldCheckedAsNumber(form.use_sharp_yuv, options.use_sharp_yuv),
      // .value
-      near_lossless: 100 - inputFieldValueAsNumber(form.near_lossless),
-      alpha_quality: inputFieldValueAsNumber(form.alpha_quality),
-      alpha_filtering: inputFieldValueAsNumber(form.alpha_filtering),
-      sns_strength: inputFieldValueAsNumber(form.sns_strength),
-      filter_strength: inputFieldValueAsNumber(form.filter_strength),
-      filter_sharpness: 7 - inputFieldValueAsNumber(form.filter_sharpness),
-      pass: inputFieldValueAsNumber(form.pass),
-      preprocessing: inputFieldValueAsNumber(form.preprocessing),
-      segments: inputFieldValueAsNumber(form.segments),
-      partitions: inputFieldValueAsNumber(form.partitions),
+      near_lossless: 100 - inputFieldValueAsNumber(form.near_lossless, 100 - options.near_lossless),
+      alpha_quality: inputFieldValueAsNumber(form.alpha_quality, options.alpha_quality),
+      alpha_filtering: inputFieldValueAsNumber(form.alpha_filtering, options.alpha_filtering),
+      sns_strength: inputFieldValueAsNumber(form.sns_strength, options.sns_strength),
+      filter_strength: inputFieldValueAsNumber(form.filter_strength, options.filter_strength),
+      filter_sharpness:
+        7 - inputFieldValueAsNumber(form.filter_sharpness, 7 - options.filter_sharpness),
+      pass: inputFieldValueAsNumber(form.pass, options.pass),
+      preprocessing: inputFieldValueAsNumber(form.preprocessing, options.preprocessing),
+      segments: inputFieldValueAsNumber(form.segments, options.segments),
+      partitions: inputFieldValueAsNumber(form.partitions, options.partitions),
    };
-    this.props.onChange(options);
+    this.props.onChange(newOptions);
  }

  private _losslessSpecificOptions(options: EncodeOptions) {
    return (
-      <div>
-        <label>
-          Effort:
-          <range-input
+      <div key="lossless">
+        <div class={style.optionOneCell}>
+          <Range
            name="lossless_preset"
            min="0"
            max="9"
-            value={'' + determineLosslessQuality(options.quality)}
-            onChange={this.onChange}
-          />
-        </label>
-        <label>
-          Slight loss:
-          <range-input
+            value={determineLosslessQuality(options.quality, options.method)}
+            onInput={this.onChange}
+          >
+            Effort:
+          </Range>
+        </div>
+        <div class={style.optionOneCell}>
+          <Range
            name="near_lossless"
            min="0"
            max="100"
            value={'' + (100 - options.near_lossless)}
-            onChange={this.onChange}
-          />
-        </label>
-        <label>
+            onInput={this.onChange}
+          >
+            Slight loss:
+          </Range>
+        </div>
+        <label class={style.optionInputFirst}>
          {/*
            Although there are 3 different kinds of image hint, webp only
            seems to do something with the 'graph' type, and I don't really
            understand what it does.
          */}
-          <input
+          <Checkbox
            name="image_hint"
-            type="checkbox"
            checked={options.image_hint === WebPImageHint.WEBP_HINT_GRAPH}
-            value={'' + WebPImageHint.WEBP_HINT_GRAPH}
            onChange={this.onChange}
          />
-          <span>Discrete tone image (graph, map-tile etc)</span>
+          Discrete tone image
        </label>
      </div>
    );
  }

  private _lossySpecificOptions(options: EncodeOptions) {
+    const { showAdvanced } = this.state;
+
    return (
-      <div>
-        <label>
-          Effort:
-          <range-input
+      <div key="lossy">
+        <div class={style.optionOneCell}>
+          <Range
            name="method_input"
            min="0"
            max="6"
-            value={'' + options.method}
-            onChange={this.onChange}
-          />
-        </label>
-        <label>
-          Quality:
-          <range-input
+            value={options.method}
+            onInput={this.onChange}
+          >
+            Effort:
+          </Range>
+        </div>
+        <div class={style.optionOneCell}>
+          <Range
            name="quality"
            min="0"
            max="100"
-            step="0.01"
-            value={'' + options.quality}
-            onChange={this.onChange}
-          />
-        </label>
-        <hr />
-        <label>
-          <input
-            name="alpha_compression"
-            type="checkbox"
-            checked={!!options.alpha_compression}
-            onChange={this.onChange}
-          />
-          Compress alpha
-        </label>
-        <label>
-          Alpha quality:
-          <range-input
-            name="alpha_quality"
-            min="0"
-            max="100"
-            value={'' + options.alpha_quality}
-            onChange={this.onChange}
-          />
-        </label>
-        <label>
-          Alpha filter quality:
-          <range-input
-            name="alpha_filtering"
-            min="0"
-            max="2"
-            value={'' + options.alpha_filtering}
-            onChange={this.onChange}
-          />
-        </label>
-        <hr />
-        <label>
-          <input
-            name="autofilter"
-            type="checkbox"
-            checked={!!options.autofilter}
-            onChange={this.onChange}
-          />
-          <span>Auto adjust filter strength</span>
-        </label>
-        <label>
-          Filter strength:
-          <range-input
-            name="filter_strength"
-            min="0"
-            max="100"
-            disabled={!!options.autofilter}
-            value={'' + options.filter_strength}
-            onChange={this.onChange}
-          />
-        </label>
-        <label>
-          <input
-            name="filter_type"
-            type="checkbox"
-            checked={!!options.filter_type}
-            onChange={this.onChange}
-          />
-          Strong filter
-        </label>
-        <label>
-          Filter sharpness:
-          <range-input
-            name="filter_sharpness"
-            min="0"
-            max="7"
-            value={'' + (7 - options.filter_sharpness)}
-            onChange={this.onChange}
-          />
-        </label>
-        <label>
-          <input
-            name="use_sharp_yuv"
-            type="checkbox"
-            checked={!!options.use_sharp_yuv}
-            onChange={this.onChange}
-          />
-          Sharp RGB->YUV conversion
-        </label>
-        <hr />
-        <label>
-          Passes:
-          <range-input
-            name="pass"
-            min="1"
-            max="10"
-            value={'' + options.pass}
-            onChange={this.onChange}
-          />
-        </label>
-        <label>
-          Spacial noise shaping:
-          <range-input
-            name="sns_strength"
-            min="0"
-            max="100"
-            value={'' + options.sns_strength}
-            onChange={this.onChange}
-          />
-        </label>
-        <label>
-          Preprocessing type:
-          <select
-            name="preprocessing"
-            value={'' + options.preprocessing}
-            onChange={this.onChange}
+            step="0.1"
+            value={options.quality}
+            onInput={this.onChange}
          >
-            <option value="0">None</option>
-            <option value="1">Segment smooth</option>
-            <option value="2">Pseudo-random dithering</option>
-          </select>
-        </label>
-        <label>
-          Segments:
-          <range-input
-            name="segments"
-            min="1"
-            max="4"
-            value={'' + options.segments}
-            onChange={this.onChange}
-          />
-        </label>
-        <label>
-          Partitions:
-          <range-input
-            name="partitions"
-            min="0"
-            max="3"
-            value={'' + options.partitions}
-            onChange={this.onChange}
+            Quality:
+          </Range>
+        </div>
+        <label class={style.optionInputFirst}>
+          <Checkbox
+            checked={showAdvanced}
+            onChange={linkState(this, 'showAdvanced')}
          />
+          Show advanced settings
        </label>
+        <Expander>
+          {showAdvanced ?
+            <div>
+              <label class={style.optionInputFirst}>
+                <Checkbox
+                  name="alpha_compression"
+                  checked={!!options.alpha_compression}
+                  onChange={this.onChange}
+                />
+                Compress alpha
+              </label>
+              <div class={style.optionOneCell}>
+                <Range
+                  name="alpha_quality"
+                  min="0"
+                  max="100"
+                  value={options.alpha_quality}
+                  onInput={this.onChange}
+                >
+                  Alpha quality:
+                </Range>
+              </div>
+              <div class={style.optionOneCell}>
+                <Range
+                  name="alpha_filtering"
+                  min="0"
+                  max="2"
+                  value={options.alpha_filtering}
+                  onInput={this.onChange}
+                >
+                  Alpha filter quality:
+                </Range>
+              </div>
+              <label class={style.optionInputFirst}>
+                <Checkbox
+                  name="autofilter"
+                  checked={!!options.autofilter}
+                  onChange={this.onChange}
+                />
+                Auto adjust filter strength
+              </label>
+              <Expander>
+                {options.autofilter ? null :
+                  <div class={style.optionOneCell}>
+                    <Range
+                      name="filter_strength"
+                      min="0"
+                      max="100"
+                      value={options.filter_strength}
+                      onInput={this.onChange}
+                    >
+                      Filter strength:
+                    </Range>
+                  </div>
+                }
+              </Expander>
+              <label class={style.optionInputFirst}>
+                <Checkbox
+                  name="filter_type"
+                  checked={!!options.filter_type}
+                  onChange={this.onChange}
+                />
+                Strong filter
+              </label>
+              <div class={style.optionOneCell}>
+                <Range
+                  name="filter_sharpness"
+                  min="0"
+                  max="7"
+                  value={7 - options.filter_sharpness}
+                  onInput={this.onChange}
+                >
+                  Filter sharpness:
+                </Range>
+              </div>
+              <label class={style.optionInputFirst}>
+                <Checkbox
+                  name="use_sharp_yuv"
+                  checked={!!options.use_sharp_yuv}
+                  onChange={this.onChange}
+                />
+                Sharp RGB→YUV conversion
+              </label>
+              <div class={style.optionOneCell}>
+                <Range
+                  name="pass"
+                  min="1"
+                  max="10"
+                  value={options.pass}
+                  onInput={this.onChange}
+                >
+                  Passes:
+                </Range>
+              </div>
+              <div class={style.optionOneCell}>
+                <Range
+                  name="sns_strength"
+                  min="0"
+                  max="100"
+                  value={options.sns_strength}
+                  onInput={this.onChange}
+                >
+                  Spacial noise shaping:
+                </Range>
+              </div>
+              <label class={style.optionTextFirst}>
+                Preprocess:
+                <Select
+                  name="preprocessing"
+                  value={options.preprocessing}
+                  onChange={this.onChange}
+                >
+                  <option value="0">None</option>
+                  <option value="1">Segment smooth</option>
+                  <option value="2">Pseudo-random dithering</option>
+                </Select>
+              </label>
+              <div class={style.optionOneCell}>
+                <Range
+                  name="segments"
+                  min="1"
+                  max="4"
+                  value={options.segments}
+                  onInput={this.onChange}
+                >
+                  Segments:
+                </Range>
+              </div>
+              <div class={style.optionOneCell}>
+                <Range
+                  name="partitions"
+                  min="0"
+                  max="3"
+                  value={options.partitions}
+                  onInput={this.onChange}
+                >
+                  Partitions:
+                </Range>
+              </div>
+            </div>
+            : null
+          }
+        </Expander>
      </div>
    );
  }
@@ -277,32 +319,26 @@ export default class WebPEncoderOptions extends Component<Props, {}> {
    // I'm rendering both lossy and lossless forms, as it becomes much easier when
    // gathering the data.
    return (
-      <form>
-        <label>
-          <input
+      <form class={style.optionsSection}>
+        <label class={style.optionInputFirst}>
+          <Checkbox
            name="lossless"
-            type="checkbox"
            checked={!!options.lossless}
            onChange={this.onChange}
          />
          Lossless
        </label>
-        <div class={options.lossless ? '' : styles.hide}>
-          {this._losslessSpecificOptions(options)}
-        </div>
-        <div class={options.lossless ? styles.hide : ''}>
-          {this._lossySpecificOptions(options)}
-        </div>
-        <label>
-          <input
+        {options.lossless
+          ? this._losslessSpecificOptions(options)
+          : this._lossySpecificOptions(options)
+        }
+        <label class={style.optionInputFirst}>
+          <Checkbox
            name="exact"
-            type="checkbox"
            checked={!!options.exact}
            onChange={this.onChange}
          />
-          <span>
-            Preserve transparent data. Otherwise, pixels with zero alpha will have RGB also zeroed.
-          </span>
+          Preserve transparent data
        </label>
      </form>
    );
--- a/src/codecs/webp/styles.scss
+++ b/src/codecs/webp/styles.scss
@@ -1,3 +0,0 @@
-.hide {
-  display: none;
-}
--- a/src/components/App/custom-els/FileDrop/index.ts
+++ b/src/components/App/custom-els/FileDrop/index.ts
@@ -1,153 +0,0 @@
-import { bind } from '../../../../lib/initial-util';
-import './styles.css';
-
-// tslint:disable-next-line:max-line-length
-function firstMatchingItem(list: DataTransferItemList, acceptVal: string): DataTransferItem | undefined {
-  // Split accepts values by ',' then by '/'. Trim everything & lowercase.
-  const accepts = acceptVal.toLowerCase().split(',').map((accept) => {
-    return accept.trim().split('/').map(part => part.trim());
-  }).filter(acceptParts => acceptParts.length === 2); // Filter invalid values
-
-  return Array.from(list).find((item) => {
-    if (item.kind !== 'file') return false;
-
-    // 'Parse' the type.
-    const [typeMain, typeSub] = item.type.toLowerCase().split('/').map(s => s.trim());
-
-    for (const [acceptMain, acceptSub] of accepts) {
-      // Look for an exact match, or a partial match if * is accepted, eg image/*.
-      if (typeMain === acceptMain && (acceptSub === '*' || typeSub === acceptSub)) {
-        return true;
-      }
-    }
-    return false;
-  });
-}
-
-function getFileData(data: DataTransfer, accept: string): File | undefined {
-  const dragDataItem = firstMatchingItem(data.items, accept);
-  if (!dragDataItem) return;
-
-  return dragDataItem.getAsFile() || undefined;
-}
-
-interface FileDropEventInit extends EventInit {
-  action: FileDropAccept;
-  file: File;
-}
-
-type FileDropAccept = 'drop' | 'paste';
-
-// Safari and Edge don't quite support extending Event, this works around it.
-function fixExtendedEvent(instance: Event, type: Function) {
-  if (!(instance instanceof type)) {
-    Object.setPrototypeOf(instance, type.prototype);
-  }
-}
-
-export class FileDropEvent extends Event {
-  private _action: FileDropAccept;
-  private _file: File;
-  constructor(typeArg: string, eventInitDict: FileDropEventInit) {
-    super(typeArg, eventInitDict);
-    fixExtendedEvent(this, FileDropEvent);
-    this._file = eventInitDict.file;
-    this._action = eventInitDict.action;
-  }
-
-  get action() {
-    return this._action;
-  }
-
-  get file() {
-    return this._file;
-  }
-}
-
-/*
-  Example Usage.
-  <file-drop
-    accept='image/*'
-    class='drop-valid|drop-invalid'
-  >
-   [everything in here is a drop target.]
-  </file-drop>
-
-  dropElement.addEventListner('dropfile', (event) => console.log(event.detail))
-*/
-export class FileDrop extends HTMLElement {
-
-  private _dragEnterCount = 0;
-
-  constructor() {
-    super();
-    this.addEventListener('dragover', event => event.preventDefault());
-    this.addEventListener('drop', this._onDrop);
-    this.addEventListener('dragenter', this._onDragEnter);
-    this.addEventListener('dragend', () => this._reset());
-    this.addEventListener('dragleave', this._onDragLeave);
-    this.addEventListener('paste', this._onPaste);
-  }
-
-  get accept() {
-    return this.getAttribute('accept') || '';
-  }
-
-  set accept(val: string) {
-    this.setAttribute('accept', val);
-  }
-
-  @bind
-  private _onDragEnter(event: DragEvent) {
-    this._dragEnterCount += 1;
-    if (this._dragEnterCount > 1) return;
-
-    // We don't have data, attempt to get it and if it matches, set the correct state.
-    const validDrop: boolean = event.dataTransfer.items.length ?
-      !!firstMatchingItem(event.dataTransfer.items, this.accept) :
-      // Safari doesn't give file information on drag enter, so the best we can do is return valid.
-      true;
-
-    if (validDrop) {
-      this.classList.add('drop-valid');
-    } else {
-      this.classList.add('drop-invalid');
-    }
-  }
-
-  @bind
-  private _onDragLeave() {
-    this._dragEnterCount -= 1;
-    if (this._dragEnterCount === 0) {
-      this._reset();
-    }
-  }
-
-  @bind
-  private _onDrop(event: DragEvent) {
-    event.preventDefault();
-    this._reset();
-    const action = 'drop';
-    const file = getFileData(event.dataTransfer, this.accept);
-    if (file === undefined) return;
-
-    this.dispatchEvent(new FileDropEvent('filedrop', { action, file }));
-  }
-
-  @bind
-  private _onPaste(event: ClipboardEvent) {
-    const action = 'paste';
-    const file = getFileData(event.clipboardData, this.accept);
-    if (file === undefined) return;
-
-    this.dispatchEvent(new FileDropEvent('filedrop', { action, file }));
-  }
-
-  private _reset() {
-    this._dragEnterCount = 0;
-    this.classList.remove('drop-valid');
-    this.classList.remove('drop-invalid');
-  }
-}
-
-customElements.define('file-drop', FileDrop);
--- a/src/components/App/custom-els/FileDrop/missing-types.d.ts
+++ b/src/components/App/custom-els/FileDrop/missing-types.d.ts
@@ -1,19 +0,0 @@
-import { FileDropEvent, FileDrop } from '.';
-
-declare global {
-
-  interface HTMLElementEventMap {
-    'filedrop': FileDropEvent;
-  }
-
-  namespace JSX {
-    interface IntrinsicElements {
-      'file-drop': FileDropAttributes;
-    }
-
-    interface FileDropAttributes extends HTMLAttributes {
-      accept?: string;
-      onfiledrop?: ((this: FileDrop, ev: FileDropEvent) => any) | null;
-    }
-  }
-}
--- a/src/components/App/custom-els/FileDrop/styles.css
+++ b/src/components/App/custom-els/FileDrop/styles.css
@@ -1,3 +0,0 @@
-file-drop {
-  display: block;
-}
--- a/src/components/App/index.tsx
+++ b/src/components/App/index.tsx
@@ -2,9 +2,9 @@ import { h, Component } from 'preact';

 import { bind, linkRef, Fileish } from '../../lib/initial-util';
 import * as style from './style.scss';
-import { FileDropEvent } from './custom-els/FileDrop';
-import './custom-els/FileDrop';
-import SnackBarElement from '../../lib/SnackBar';
+import { FileDropEvent } from 'file-drop-element';
+import 'file-drop-element';
+import SnackBarElement, { SnackOptions } from '../../lib/SnackBar';
 import '../../lib/SnackBar';
 import Intro from '../intro';
 import '../custom-els/LoadingSpinner';
@@ -39,7 +39,7 @@ export default class App extends Component<Props, State> {
    import('../compress').then((module) => {
      this.setState({ Compress: module.default });
    }).catch(() => {
-      this.showError('Failed to load app');
+      this.showSnack('Failed to load app');
    });

    // In development, persist application state across hot reloads:
@@ -66,19 +66,19 @@ export default class App extends Component<Props, State> {
  }

  @bind
-  private showError(error: string) {
+  private showSnack(message: string, options: SnackOptions = {}): Promise<string> {
    if (!this.snackbar) throw Error('Snackbar missing');
-    this.snackbar.showSnackbar({ message: error });
+    return this.snackbar.showSnackbar(message, options);
  }

  render({}: Props, { file, Compress }: State) {
    return (
      <div id="app" class={style.app}>
-        <file-drop accept="image/*" onfiledrop={this.onFileDrop}>
+        <file-drop accept="image/*" onfiledrop={this.onFileDrop} class={style.drop}>
          {(!file)
-            ? <Intro onFile={this.onIntroPickFile} onError={this.showError} />
+            ? <Intro onFile={this.onIntroPickFile} showSnack={this.showSnack} />
            : (Compress)
-              ? <Compress file={file} onError={this.showError} />
+              ? <Compress file={file} showSnack={this.showSnack} />
              : <loading-spinner class={style.appLoader}/>
          }
          <snack-bar ref={linkRef(this, 'snackbar')} />
--- a/src/components/App/style.scss
+++ b/src/components/App/style.scss
@@ -1,7 +1,3 @@
-/*
-Note: These styles are temporary. They will be replaced before going live.
-*/
-
 .app {
  position: absolute;
  left: 0;
@@ -12,14 +8,14 @@ Note: These styles are temporary. They will be replaced before going live.
  contain: strict;
 }

-:global {
-  file-drop {
-    overflow: hidden;
-    touch-action: none;
-    height:100%;
-    width:100%;
+.drop {
+  overflow: hidden;
+  touch-action: none;
+  height: 100%;
+  width: 100%;

-    &:after {
+  &:global {
+    &::after {
      content: '';
      position: absolute;
      display: block;
@@ -28,28 +24,20 @@ Note: These styles are temporary. They will be replaced before going live.
      right: 10px;
      bottom: 10px;
      border: 2px dashed #fff;
+      background-color:rgba(88, 116, 88, 0.2);
+      border-color: rgba(65, 129, 65, 0.5);
      border-radius: 10px;
      opacity: 0;
      transform: scale(0.95);
-      transition: opacity 300ms ease, transform 300ms cubic-bezier(.6,2,.6,1), background-color 300ms step-end, border-color 300ms step-end;
+      transition: all 200ms ease-in;
+      transition-property: transform, opacity;
      pointer-events: none;
    }

-    &.drop-valid:after,
-    &.drop-invalid:after {
+    &.drop-valid::after {
      opacity: 1;
      transform: scale(1);
-      transition: opacity 300ms ease, transform 300ms cubic-bezier(.6,2,.6,1);
-    }
-
-    &.drop-valid:after {
-      background-color:rgba(88, 116, 88, 0.2);
-      border-color: rgba(65, 129, 65, 0.5);
-    }
-
-    &.drop-invalid:after {
-      background-color:rgba(119, 85, 85, 0.2);
-      border-color:rgba(129, 63, 63, 0.5);
+      transition-timing-function: ease-out;
    }
  }
 }
--- a/src/components/FileSize.tsx
+++ b/src/components/FileSize.tsx
@@ -1,87 +0,0 @@
-import { h, Component } from 'preact';
-import * as prettyBytes from 'pretty-bytes';
-
-type FileContents = ArrayBuffer | Blob;
-
-interface Props extends Pick<JSX.HTMLAttributes, Exclude<keyof JSX.HTMLAttributes, 'data'>> {
-  file?: FileContents;
-  compareTo?: FileContents;
-  increaseClass?: string;
-  decreaseClass?: string;
-}
-
-interface State {
-  size?: number;
-  sizeFormatted?: string;
-  compareSize?: number;
-  compareSizeFormatted?: string;
-}
-
-function calculateSize(data: FileContents): number {
-  return data instanceof ArrayBuffer ? data.byteLength : data.size;
-}
-
-export default class FileSize extends Component<Props, State> {
-  constructor(props: Props) {
-    super(props);
-    if (props.file) {
-      this.computeSize('size', props.file);
-    }
-    if (props.compareTo) {
-      this.computeSize('compareSize', props.compareTo);
-    }
-  }
-
-  componentWillReceiveProps({ file, compareTo }: Props) {
-    if (file !== this.props.file) {
-      this.computeSize('size', file);
-    }
-    if (compareTo !== this.props.compareTo) {
-      this.computeSize('compareSize', compareTo);
-    }
-  }
-
-  componentDidMount() {
-    this.applyStyles();
-  }
-
-  componentDidUpdate() {
-    this.applyStyles();
-  }
-
-  applyStyles() {
-    const { size, compareSize = 0 } = this.state;
-    if (size != null && this.base) {
-      const delta = size && compareSize ? (size - compareSize) / compareSize : 0;
-      this.base.style.setProperty('--size', '' + size);
-      this.base.style.setProperty('--size-delta', '' + Math.round(Math.abs(delta * 100)));
-    }
-  }
-
-  computeSize(prop: keyof State, data?: FileContents) {
-    const size = data ? calculateSize(data) : 0;
-    const pretty = prettyBytes(size);
-    this.setState({
-      [prop]: size,
-      [prop + 'Formatted']: pretty,
-    });
-  }
-
-  render(
-    { file, compareTo, increaseClass, decreaseClass, ...props }: Props,
-    { size, sizeFormatted = '', compareSize }: State,
-  ) {
-    const delta = size && compareSize ? (size - compareSize) / compareSize : 0;
-    return (
-      <span {...props}>
-        {sizeFormatted}
-        {compareTo && (
-          <span class={delta > 0 ? increaseClass : decreaseClass}>
-            {delta > 0 && '+'}
-            {Math.round(delta * 100)}%
-          </span>
-        )}
-      </span>
-    );
-  }
-}
--- a/src/components/Options/index.tsx
+++ b/src/components/Options/index.tsx
@@ -1,7 +1,7 @@
 import { h, Component } from 'preact';

 import * as style from './style.scss';
-import { bind, Fileish } from '../../lib/initial-util';
+import { bind } from '../../lib/initial-util';
 import { cleanSet, cleanMerge } from '../../lib/clean-modify';
 import OptiPNGEncoderOptions from '../../codecs/optipng/options';
 import MozJpegEncoderOptions from '../../codecs/mozjpeg/options';
@@ -31,14 +31,14 @@ import {
  encoders,
  encodersSupported,
  EncoderSupportMap,
-  encoderMap,
 } from '../../codecs/encoders';
 import { QuantizeOptions } from '../../codecs/imagequant/processor-meta';
 import { ResizeOptions } from '../../codecs/resize/processor-meta';
 import { PreprocessorState } from '../../codecs/preprocessors';
-import FileSize from '../FileSize';
-import { DownloadIcon } from '../../lib/icons';
 import { SourceImage } from '../App';
+import Checkbox from '../checkbox';
+import Expander from '../expander';
+import Select from '../select';

 const encoderOptionsComponentMap = {
  [identity.type]: undefined,
@@ -56,23 +56,14 @@ const encoderOptionsComponentMap = {
  [browserPDF.type]: undefined,
 };

-const titles = {
-  horizontal: ['Left Image', 'Right Image'],
-  vertical: ['Top Image', 'Bottom Image'],
-};
-
 interface Props {
-  orientation: 'horizontal' | 'vertical';
+  mobileView: boolean;
  source?: SourceImage;
-  imageIndex: number;
-  imageFile?: Fileish;
-  downloadUrl?: string;
  encoderState: EncoderState;
  preprocessorState: PreprocessorState;
  onEncoderTypeChange(newType: EncoderType): void;
  onEncoderOptionsChange(newOptions: EncoderOptions): void;
  onPreprocessorOptionsChange(newOptions: PreprocessorState): void;
-  onCopyToOtherClick(): void;
 }

 interface State {
@@ -80,7 +71,9 @@ interface State {
 }

 export default class Options extends Component<Props, State> {
-  typeSelect?: HTMLSelectElement;
+  state: State = {
+    encoderSupportMap: undefined,
+  };

  constructor() {
    super();
@@ -121,19 +114,9 @@ export default class Options extends Component<Props, State> {
    );
  }

-  @bind
-  onCopyToOtherClick(event: Event) {
-    event.preventDefault();
-    this.props.onCopyToOtherClick();
-  }
-
  render(
    {
      source,
-      imageIndex,
-      imageFile,
-      downloadUrl,
-      orientation,
      encoderState,
      preprocessorState,
      onEncoderOptionsChange,
@@ -144,64 +127,65 @@ export default class Options extends Component<Props, State> {
    const EncoderOptionComponent = encoderOptionsComponentMap[encoderState.type];

    return (
-      <div class={`${style.options} ${style[orientation]}`}>
-        <h2 class={style.title}>
-          {titles[orientation][imageIndex]}
-          {', '}
-          {encoderMap[encoderState.type].label}
-        </h2>
-
-        <div class={style.content}>
-          <section class={style.picker}>
-            {encoderSupportMap ?
-              <select value={encoderState.type} onChange={this.onEncoderTypeChange}>
-                {encoders.filter(encoder => encoderSupportMap[encoder.type]).map(encoder => (
-                  <option value={encoder.type}>{encoder.label}</option>
-                ))}
-              </select>
-              :
-              <select><option>Loading…</option></select>
-            }
-          </section>
-
-          {encoderState.type !== 'identity' && (
-            <div key="preprocessors" class={style.preprocessors}>
-              <label class={style.toggle}>
-                <input
+      <div class={style.optionsScroller}>
+        <Expander>
+          {encoderState.type === identity.type ? null :
+            <div>
+              <h3 class={style.optionsTitle}>Edit</h3>
+              <label class={style.sectionEnabler}>
+                <Checkbox
                  name="resize.enable"
-                  type="checkbox"
                  checked={!!preprocessorState.resize.enabled}
                  onChange={this.onPreprocessorEnabledChange}
                />
                Resize
              </label>
-              {preprocessorState.resize.enabled &&
-                <ResizeOptionsComponent
-                  isVector={Boolean(source && source.vectorImage)}
-                  aspect={source ? (source.data.width / source.data.height) : 1}
-                  options={preprocessorState.resize}
-                  onChange={this.onResizeOptionsChange}
-                />
-              }
-              <label class={style.toggle}>
-                <input
+              <Expander>
+                {preprocessorState.resize.enabled ?
+                  <ResizeOptionsComponent
+                    isVector={Boolean(source && source.vectorImage)}
+                    aspect={source ? (source.data.width / source.data.height) : 1}
+                    options={preprocessorState.resize}
+                    onChange={this.onResizeOptionsChange}
+                  />
+                : null}
+              </Expander>
+              <label class={style.sectionEnabler}>
+                <Checkbox
                  name="quantizer.enable"
-                  type="checkbox"
                  checked={!!preprocessorState.quantizer.enabled}
                  onChange={this.onPreprocessorEnabledChange}
                />
-                Quantize
+                Reduce palette
              </label>
-              {preprocessorState.quantizer.enabled &&
-                <QuantizerOptionsComponent
-                  options={preprocessorState.quantizer}
-                  onChange={this.onQuantizerOptionsChange}
-                />
-              }
+              <Expander>
+                {preprocessorState.quantizer.enabled ?
+                  <QuantizerOptionsComponent
+                    options={preprocessorState.quantizer}
+                    onChange={this.onQuantizerOptionsChange}
+                  />
+                : null}
+              </Expander>
            </div>
-          )}
+          }
+        </Expander>

-          {EncoderOptionComponent &&
+        <h3 class={style.optionsTitle}>Compress</h3>
+
+        <section class={`${style.optionOneCell} ${style.optionsSection}`}>
+          {encoderSupportMap ?
+            <Select value={encoderState.type} onChange={this.onEncoderTypeChange} large>
+              {encoders.filter(encoder => encoderSupportMap[encoder.type]).map(encoder => (
+                <option value={encoder.type}>{encoder.label}</option>
+              ))}
+            </Select>
+            :
+            <Select large><option>Loading…</option></Select>
+          }
+        </section>
+
+        <Expander>
+          {EncoderOptionComponent ?
            <EncoderOptionComponent
              options={
                // Casting options, as encoderOptionsComponentMap[encodeData.type] ensures
@@ -210,33 +194,8 @@ export default class Options extends Component<Props, State> {
              }
              onChange={onEncoderOptionsChange}
            />
-          }
-        </div>
-
-        <div class={style.row}>
-          <button onClick={this.onCopyToOtherClick}>Copy settings to other side</button>
-        </div>
-
-        <div class={style.sizeDetails}>
-          <FileSize
-            class={style.size}
-            increaseClass={style.increase}
-            decreaseClass={style.decrease}
-            file={imageFile}
-            compareTo={(source && imageFile !== source.file) ? source.file : undefined}
-          />
-
-          {(downloadUrl && imageFile) && (
-            <a
-              class={style.download}
-              href={downloadUrl}
-              download={imageFile.name}
-              title="Download"
-            >
-              <DownloadIcon />
-            </a>
-          )}
-        </div>
+          : null}
+        </Expander>
      </div>
    );
  }
--- a/src/components/Options/style.scss
+++ b/src/components/Options/style.scss
@@ -1,225 +1,57 @@
-/*
-Note: These styles are temporary. They will be replaced before going live.
-*/
+$horizontalPadding: 15px;

-.row {
-  padding: 5px;
-  margin: 0 10px;
-}
-
-.options {
-  box-sizing: border-box;
-  padding: 0;
-  background: rgba(40,40,40,0.8);
-  box-shadow: 0 1px 3px rgba(0,0,0,0.5);
-  color: #eee;
-  overflow: auto;
-  z-index: 1;
-  opacity: 0.9;
-  transform-origin: 50% 140%;
-  transition: opacity 300ms linear;
-  animation: options-open 500ms cubic-bezier(.6,1.6,.6,1) forwards 1;
-
-  &.horizontal {
-    border-radius: 1px 1px 5px 5px;
-    width: 230px;
-
-    > .inner {
-      max-height: 80vh;
-      overflow: auto;
-      -webkit-overflow-scrolling: touch;
-      -ms-touch-action: pan-y;
-      touch-action: pan-y;
-    }
-  }
-
-  &.vertical {
-    opacity: 1;
-    margin: 0 5px 10px;
-    border-radius: 0 0 5px 5px;
-  }
-
-  &:hover, &:focus, &:focus-within {
-    opacity: 1;
-  }
-
-  @keyframes options-open {
-    from {
-      transform: translateY(100px) scale(.8);
-    }
-  }
-
-  .content {
-    max-height: calc(75vh - 100px);
-    overflow: auto;
-    touch-action: pan-y;
-    -webkit-overflow-scrolling: touch;
-  }
-
-  .picker {
-    margin: 5px 15px;
-
-    select {
-      display: block;
-      width: 100%;
-      box-sizing: border-box;
-      -webkit-appearance: none;
-      appearance: none;
-      padding: 10px 30px 10px 10px;
-      background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="25" height="5"><polygon fill="#fff" points="10,0 5,5 0,0"/></svg>') right center no-repeat;
-      background-color: var(--gray-dark);
-      opacity: 0.9;
-      border: none;
-      font: inherit;
-      color: white;
-      transition: box-shadow 150ms ease;
-
-      &:hover {
-        opacity: 1;
-      }
-      &:focus {
-        opacity: 1;
-        outline: none;
-        box-shadow: 0 0 0 2px var(--button-fg, #ccc);
-      }
-    }
-  }
-
-  .title {
-    display: flex;
-    align-items: center;
-    padding: 10px 15px;
-    margin: 0 0 12px;
-    background: rgba(0,0,0,0.9);
-    font: inherit;
-  }
-
-  label {
-    display: block;
-    padding: 5px;
-    margin: 0 10px;
-    display: flex;
-    flex-wrap: wrap;
-
-    // prevent labels from wrapping below checkboxes
-    > span {
-      flex: 1;
-    }
-
-    input[type=checkbox],
-    input[type=radio] {
-      flex: 0;
-      margin: 2px 8px 0 0;
-    }
-
-    range-input {
-      display: block;
-      flex: 1 0 100%;
-      margin: 2px 0;
-    }
-  }
-
-  hr {
-    height: 1px;
-    border: none;
-    margin: 5px 0;
-    box-shadow: inset 0 0.5px 0 rgba(0, 0, 0, 0.4), inset 0 -0.5px 0 rgba(255, 255, 255, 0.2);
-  }
-}
-
-.picker {
-  margin: 5px 15px;
-
-  select {
-    display: block;
-    width: 100%;
-    box-sizing: border-box;
-    -webkit-appearance: none;
-    appearance: none;
-    padding: 10px 30px 10px 10px;
-    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="25" height="5"><polygon fill="#fff" points="10,0 5,5 0,0"/></svg>') right center no-repeat;
-    background-color: var(--gray-dark);
-    opacity: 0.9;
-    border: none;
-    font: inherit;
-    color: white;
-  }
-
-  hr {
-    height: 1px;
-    border: none;
-    margin: 5px 0;
-    box-shadow: inset 0 0.5px 0 rgba(0, 0, 0, 0.4), inset 0 -0.5px 0 rgba(255, 255, 255, 0.2);
-  }
-}
-
-.size-details {
-  display: flex;
-  align-items: center;
-  padding: 5px 15px;
-  background: rgba(0,0,0,0.5);
-}
-
-.download {
-  flex: 0;
-  margin: 0 0 0 auto;
-  background: rgba(255,255,255,0.1);
-  border-radius: 50%;
-  padding: 5px;
-  width: 16px;
-  height: 16px;
-  text-decoration: none;
-
-  > svg {
-    width: 16px;
-    height: 16px;
-    fill: #fff;
-  }
-
-  &:hover {
-    background-color: rgba(255,255,255,0.3);
-  }
-}
-
-.size-details {
-  padding: 5px 15px;
-  background: rgba(0,0,0,0.5);
-}
-
-.size {
+.options-title {
+  background: rgba(0, 0, 0, 0.9);
+  margin: 0;
+  padding: 10px $horizontalPadding;
  font-weight: normal;
+  font-size: 1.4rem;
+  border-bottom: 1px solid #000;
 }

-.increase,
-.decrease {
-  font-style: italic;
-  filter: #{"grayscale(calc(50% - var(--size-delta, 50) * 0.5%))"};
-
-  &:before {
-    content: ' (';
-  }
-  &:after {
-    content: ')';
-  }
+.option-text-first {
+  display: grid;
+  align-items: center;
+  grid-template-columns: 87px 1fr;
+  grid-gap: 0.7em;
+  padding: 10px $horizontalPadding;
 }

-.increase {
-  color: var(--negative);
-}
-.decrease {
-  color: var(--positive);
+.option-one-cell {
+  display: grid;
+  grid-template-columns: 1fr;
+  padding: 10px $horizontalPadding;
 }

-.preprocessors {
-  padding: 5px 0;
-  margin: 5px 0;
-  box-shadow: inset 0 -.5px 0 rgba(0,0,0,0.4), 0 .5px 0 rgba(255,255,255,0.2);
+.option-input-first,
+.section-enabler {
+  cursor: pointer;
+  display: grid;
+  align-items: center;
+  grid-template-columns: auto 1fr;
+  grid-gap: 0.7em;
+  padding: 10px $horizontalPadding;
 }

-.toggle {
-  display: flex;
-  position: relative;
-  align-content: center;
-  font-size: 14px;
-  box-shadow: inset 0 -.5px 0 rgba(0,0,0,0.4), 0 .5px 0 rgba(255,255,255,0.2);
+.section-enabler {
+  background: rgba(0, 0, 0, 0.8);
+}
+
+.options-section {
+  background: rgba(0, 0, 0, 0.7);
+}
+
+.text-field {
+  background: #fff;
+  font: inherit;
+  border: none;
+  padding: 2px 0 2px 10px;
+  width: 100%;
+  box-sizing: border-box;
+  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.5);
+}
+
+.options-scroller {
+  overflow-x: hidden;
+  overflow-y: auto;
 }
--- a/src/components/Output/custom-els/PinchZoom/index.ts
+++ b/src/components/Output/custom-els/PinchZoom/index.ts
@@ -1,5 +1,5 @@
+import PointerTracker, { Pointer } from 'pointer-tracker';
 import './styles.css';
-import { PointerTracker, Pointer } from '../../../../lib/PointerTracker';

 interface Point {
  clientX: number;
@@ -145,7 +145,7 @@ export default class PinchZoom extends HTMLElement {
    const relativeToEl = (relativeTo === 'content' ? this._positioningEl : this);

    // No content element? Fall back to just setting scale
-    if (!relativeToEl) {
+    if (!relativeToEl || !this._positioningEl) {
      this.setTransform({ scale, allowChangeEvent });
      return;
    }
@@ -157,6 +157,10 @@ export default class PinchZoom extends HTMLElement {
    if (relativeTo === 'content') {
      originX += this.x;
      originY += this.y;
+    } else {
+      const currentRect = this._positioningEl.getBoundingClientRect();
+      originX -= currentRect.left;
+      originY -= currentRect.top;
    }

    this._applyChange({
--- a/src/components/Output/custom-els/TwoUp/index.ts
+++ b/src/components/Output/custom-els/TwoUp/index.ts
@@ -1,5 +1,5 @@
+import PointerTracker, { Pointer } from 'pointer-tracker';
 import * as styles from './styles.css';
-import { PointerTracker, Pointer } from '../../../../lib/PointerTracker';

 const legacyClipCompatAttr = 'legacy-clip-compat';
 const orientationAttr = 'orientation';
@@ -68,12 +68,14 @@ export default class TwoUp extends HTMLElement {
  }

  connectedCallback() {
-    this._handle.innerHTML = `<div class="${styles.scrubber}">${
-      '<svg viewBox="0 0 20 10" fill="currentColor"><path d="M8 0v10L0 5zM12 0v10l8-5z"/></svg>'
-    }</div>`;
-
    this._childrenChange();
+
    if (!this._everConnected) {
+      this._handle.innerHTML = `<div class="${styles.scrubber}">${
+        `<svg viewBox="0 0 27 20" fill="currentColor">${
+          '<path d="M17 19.2l9.5-9.6L16.9 0zM9.6 0L0 9.6l9.6 9.6z"/>'
+        }</svg>`
+      }</div>`;
      this._resetPosition();
      this._everConnected = true;
    }
--- a/src/components/Output/custom-els/TwoUp/styles.css
+++ b/src/components/Output/custom-els/TwoUp/styles.css
@@ -6,29 +6,41 @@ two-up {
  --track-color: var(--accent-color);
  --thumb-background: #fff;
  --thumb-color: var(--accent-color);
+  --thumb-size: 62px;
+  --bar-size: 6px;
+  --bar-touch-size: 30px;
 }

 two-up > * {
-  /* Overlay all children on top of each other, and let
-  two-up's layout contain all of them. */
+  /* Overlay all children on top of each other, and let two-up's layout contain all of them. */
  grid-area: 1/1;
 }

-two-up[legacy-clip-compat] > :not(.twoUpHandle) {
+two-up[legacy-clip-compat] > :not(.two-up-handle) {
+  /* Legacy mode uses clip rather than clip-path (Edge doesn't support clip-path), but clip requires
+  elements to be positioned absolutely */
  position: absolute;
 }

-.twoUpHandle {
+.two-up-handle {
  touch-action: none;
  position: relative;
-  width: 10px;
-  background: var(--track-color);
+  width: var(--bar-touch-size);
  transform: translateX(var(--split-point)) translateX(-50%);
-  box-shadow: inset 4px 0 0 rgba(0,0,0,0.1), 0 1px 4px rgba(0,0,0,0.4);
  will-change: transform;
  cursor: ew-resize;
 }

+.two-up-handle::before {
+  content: '';
+  display: block;
+  height: 100%;
+  width: var(--bar-size);
+  margin: 0 auto;
+  box-shadow: inset calc(var(--bar-size) / 2) 0 0 rgba(0,0,0,0.1), 0 1px 4px rgba(0,0,0,0.4);
+  background: var(--track-color);
+}
+
 .scrubber {
  display: flex;
  position: absolute;
@@ -36,51 +48,56 @@ two-up[legacy-clip-compat] > :not(.twoUpHandle) {
  left: 50%;
  transform-origin: 50% 50%;
  transform: translate(-50%, -50%);
-  width: 62px;
-  height: 56px;
+  width: var(--thumb-size);
+  height: calc(var(--thumb-size) * 0.9);
  background: var(--thumb-background);
  border: 1px solid rgba(0,0,0,0.2);
-  border-radius: 5px;
+  border-radius: var(--thumb-size);
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  color: var(--thumb-color);
-}
-.scrubber svg {
-  flex: 1;
-  margin: 0 10px;
+  box-sizing: border-box;
+  padding: 0 calc(var(--thumb-size) * 0.24);
 }

-two-up[orientation='vertical'] .twoUpHandle {
+.scrubber svg {
+  flex: 1;
+}
+
+two-up[orientation='vertical'] .two-up-handle {
  width: auto;
-  height: 7px;
+  height: var(--bar-touch-size);
  transform: translateY(var(--split-point)) translateY(-50%);
-  box-shadow: inset 0 3px 0 rgba(0,0,0,0.1), 0 1px 4px rgba(0,0,0,0.4);
  cursor: ns-resize;
 }

+two-up[orientation='vertical'] .two-up-handle::before {
+  width: auto;
+  height: var(--bar-size);
+  box-shadow: inset 0 calc(var(--bar-size) / 2) 0 rgba(0,0,0,0.1), 0 1px 4px rgba(0,0,0,0.4);
+  margin: calc((var(--bar-touch-size) - var(--bar-size)) / 2) 0 0 0;
+}
+
 two-up[orientation='vertical'] .scrubber {
-  width: 46px;
-  height: 40px;
-  font-size: 18px;
  box-shadow: 1px 0 4px rgba(0,0,0,0.1);
  transform: translate(-50%, -50%) rotate(-90deg);
 }

-two-up > :nth-child(1):not(.twoUpHandle) {
+two-up > :nth-child(1):not(.two-up-handle) {
  -webkit-clip-path: inset(0 calc(100% - var(--split-point)) 0 0);
  clip-path: inset(0 calc(100% - var(--split-point)) 0 0);
 }

-two-up > :nth-child(2):not(.twoUpHandle) {
+two-up > :nth-child(2):not(.two-up-handle) {
  -webkit-clip-path: inset(0 0 0 var(--split-point));
  clip-path: inset(0 0 0 var(--split-point));
 }

-two-up[orientation='vertical'] > :nth-child(1):not(.twoUpHandle) {
+two-up[orientation='vertical'] > :nth-child(1):not(.two-up-handle) {
  -webkit-clip-path: inset(0 0 calc(100% - var(--split-point)) 0);
  clip-path: inset(0 0 calc(100% - var(--split-point)) 0);
 }

-two-up[orientation='vertical'] > :nth-child(2):not(.twoUpHandle) {
+two-up[orientation='vertical'] > :nth-child(2):not(.two-up-handle) {
  -webkit-clip-path: inset(var(--split-point) 0 0 0);
  clip-path: inset(var(--split-point) 0 0 0);
 }
@@ -90,19 +107,19 @@ two-up[orientation='vertical'] > :nth-child(2):not(.twoUpHandle) {
  It performs way better in Safari.
 */
@supports not ((clip-path: inset(0 0 0 0)) or (-webkit-clip-path: inset(0 0 0 0))) {
-  two-up[legacy-clip-compat] > :nth-child(1):not(.twoUpHandle) {
+  two-up[legacy-clip-compat] > :nth-child(1):not(.two-up-handle) {
    clip: rect(auto var(--split-point) auto auto);
  }

-  two-up[legacy-clip-compat] > :nth-child(2):not(.twoUpHandle) {
+  two-up[legacy-clip-compat] > :nth-child(2):not(.two-up-handle) {
    clip: rect(auto auto auto var(--split-point));
  }

-  two-up[orientation='vertical'][legacy-clip-compat] > :nth-child(1):not(.twoUpHandle) {
+  two-up[orientation='vertical'][legacy-clip-compat] > :nth-child(1):not(.two-up-handle) {
    clip: rect(auto auto var(--split-point) auto);
  }

-  two-up[orientation='vertical'][legacy-clip-compat] > :nth-child(2):not(.twoUpHandle) {
+  two-up[orientation='vertical'][legacy-clip-compat] > :nth-child(2):not(.two-up-handle) {
    clip: rect(var(--split-point) auto auto auto);
  }
 }
--- a/src/components/Output/index.tsx
+++ b/src/components/Output/index.tsx
@@ -10,7 +10,7 @@ import { twoUpHandle } from './custom-els/TwoUp/styles.css';

 interface Props {
  originalImage?: ImageData;
-  orientation: 'horizontal' | 'vertical';
+  mobileView: boolean;
  leftCompressed?: ImageData;
  rightCompressed?: ImageData;
  leftImgContain: boolean;
@@ -113,14 +113,19 @@ export default class Output extends Component<Props, State> {
  }

  @bind
-  private editScale() {
+  private onScaleValueFocus() {
    this.setState({ editingScale: true }, () => {
-      if (this.scaleInput) this.scaleInput.focus();
+      if (this.scaleInput) {
+        // Firefox unfocuses the input straight away unless I force a style calculation here. I have
+        // no idea why, but it's late and I'm quite tired.
+        getComputedStyle(this.scaleInput).transform;
+        this.scaleInput.focus();
+      }
    });
  }

  @bind
-  private cancelEditScale() {
+  private onScaleInputBlur() {
    this.setState({ editingScale: false });
  }

@@ -175,10 +180,7 @@ export default class Output extends Component<Props, State> {
  }

  render(
-    {
-      orientation, leftCompressed, rightCompressed, leftImgContain, rightImgContain,
-      originalImage,
-    }: Props,
+    { mobileView, leftImgContain, rightImgContain, originalImage }: Props,
    { scale, editingScale, altBackground }: State,
  ) {
    const leftDraw = this.leftDrawable();
@@ -188,7 +190,8 @@ export default class Output extends Component<Props, State> {
      <div class={`${style.output} ${altBackground ? style.altBackground : ''}`}>
        <two-up
          legacy-clip-compat
-          orientation={orientation}
+          class={style.twoUp}
+          orientation={mobileView ? 'vertical' : 'horizontal'}
          // Event redirecting. See onRetargetableEvent.
          onTouchStartCapture={this.onRetargetableEvent}
          onTouchEndCapture={this.onRetargetableEvent}
@@ -198,6 +201,7 @@ export default class Output extends Component<Props, State> {
          onWheelCapture={this.onRetargetableEvent}
        >
          <pinch-zoom
+            class={style.pinchZoom}
            onChange={this.onPinchZoomLeftChange}
            ref={linkRef(this, 'pinchZoomLeft')}
          >
@@ -213,7 +217,7 @@ export default class Output extends Component<Props, State> {
              }}
            />
          </pinch-zoom>
-          <pinch-zoom ref={linkRef(this, 'pinchZoomRight')}>
+          <pinch-zoom class={style.pinchZoom} ref={linkRef(this, 'pinchZoomRight')}>
            <canvas
              class={style.outputCanvas}
              ref={linkRef(this, 'canvasRight')}
@@ -229,7 +233,7 @@ export default class Output extends Component<Props, State> {
        </two-up>

        <div class={style.controls}>
-          <div class={style.group}>
+          <div class={style.zoomControls}>
            <button class={style.button} onClick={this.zoomOut}>
              <RemoveIcon />
            </button>
@@ -243,11 +247,11 @@ export default class Output extends Component<Props, State> {
                class={style.zoom}
                value={Math.round(scale * 100)}
                onInput={this.onScaleInputChanged}
-                onBlur={this.cancelEditScale}
+                onBlur={this.onScaleInputBlur}
              />
            ) : (
-              <span class={style.zoom} tabIndex={0} onFocus={this.editScale}>
-                <strong>{Math.round(scale * 100)}</strong>
+              <span class={style.zoom} tabIndex={0} onFocus={this.onScaleValueFocus}>
+                <span class={style.zoomValue}>{Math.round(scale * 100)}</span>
                %
              </span>
            )}
--- a/src/components/Output/style.scss
+++ b/src/components/Output/style.scss
@@ -1,135 +1,71 @@
-/*
-Note: These styles are temporary. They will be replaced before going live.
-*/
-
-%fill {
-  position: absolute;
-  left: 0;
-  top: 0;
-  width: 100%;
-  height: 100%;
-  overflow: hidden;
-  contain: strict;
-}
-
 .output {
-  @extend %fill;
+  composes: abs-fill from '../../lib/util.scss';

-  &:before {
+  &::before {
    content: '';
-    @extend %fill;
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
    background: #000;
    opacity: 0;
    transition: opacity 500ms ease;
  }
-  &.altBackground:before {
-    opacity: .6;
-  }

-  > two-up {
-    @extend %fill;
-    --accent-color: var(--button-fg);
-
-    > pinch-zoom {
-      @extend %fill;
-      outline: none;
-      display: flex;
-      justify-content: center;
-      align-items: center;
-    }
+  &.alt-background::before {
+    opacity: 0.6;
  }
 }

+.two-up {
+  composes: abs-fill from '../../lib/util.scss';
+  --accent-color: var(--button-fg);
+}
+
+.pinch-zoom {
+  composes: abs-fill from '../../lib/util.scss';
+  outline: none;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+}
+
 .controls {
  position: absolute;
  display: flex;
  justify-content: center;
-  left: 220px;
-  right: 220px;
-  bottom: 0;
+  top: 0;
+  left: 0;
+  right: 0;
  padding: 9px;
  overflow: hidden;
  flex-wrap: wrap;
  contain: content;

-  @media (max-width: 680px) {
-    top: 0;
-    bottom: auto;
-    left: 0;
-    right: 0;
+  // Allow clicks to fall through to the pinch zoom area
+  pointer-events: none;
+  & > * {
+    pointer-events: auto;
  }

-  > * {
-    z-index: 2;
+  @media (min-width: 860px) {
+    top: auto;
+    left: 320px;
+    right: 320px;
+    bottom: 0;
  }
+}

-  .group {
-    display: flex;
-  }
+.zoom-controls {
+  display: flex;

-  .button,
-  .zoom {
-    display: flex;
-    align-items: center;
-    flex: 0;
-    box-sizing: border-box;
-    height: 48px;
-    padding: 0 16px;
-    margin: 4px;
-    background-color: #fff;
-    border: 1px solid rgba(0,0,0,0.2);
-    border-radius: 5px;
-    line-height: 1;
-    font-size: 110%;
-    white-space: nowrap;
-
-    &:focus {
-      box-shadow: 0 0 0 2px var(--button-fg);
-      outline: none;
-      z-index: 1;
-    }
-  }
-
-  .button {
-    text-transform: uppercase;
-    color: var(--button-fg);
-    cursor: pointer;
-    text-indent: 6px;
-  }
-
-  .button:hover {
-    background-color: #eee;
-  }
-
-  .zoom {
-    flex: 0 0 6em;
-    color: #625E80;
-    font: inherit;
-    cursor: text;
-    width: 6em;
-    text-align: center;
-    justify-content: center;
-
-    &:focus {
-      box-shadow: inset 0 1px 4px rgba(0,0,0,0.2), 0 0 0 2px var(--button-fg);
-    }
-
-    strong {
-      position: relative;
-      top: 1px;
-      margin: 0 3px 0 0;
-      color: #888;
-      font-weight: normal;
-      border-bottom: 1px dashed #999;
-    }
-  }
-
-  .group > :not(:first-child) {
+  & :not(:first-child) {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    margin-left: 0;
  }
-  .group > :not(:last-child) {
+  & :not(:last-child) {
    margin-right: 0;
    border-right-width: 0;
    border-top-right-radius: 0;
@@ -137,6 +73,64 @@ Note: These styles are temporary. They will be replaced before going live.
  }
 }

+.button,
+.zoom {
+  display: flex;
+  align-items: center;
+  box-sizing: border-box;
+  height: 48px;
+  padding: 0 16px;
+  margin: 4px;
+  background-color: #fff;
+  border: 1px solid rgba(0,0,0,0.2);
+  border-radius: 5px;
+  line-height: 1;
+  white-space: nowrap;
+
+  &:focus {
+    box-shadow: 0 0 0 2px var(--button-fg);
+    outline: none;
+    z-index: 1;
+  }
+}
+
+.button {
+  text-transform: uppercase;
+  color: var(--button-fg);
+  cursor: pointer;
+  text-indent: 6px;
+  font-size: 110%;
+
+  &:hover {
+    background-color: #eee;
+  }
+}
+
+.zoom {
+  color: #625E80;
+  cursor: text;
+  width: 6em;
+  font: inherit;
+  text-align: center;
+  justify-content: center;
+
+  &:focus {
+    box-shadow: inset 0 1px 4px rgba(0,0,0,0.2), 0 0 0 2px var(--button-fg);
+  }
+}
+
+.zoom-value {
+  position: relative;
+  top: 1px;
+  margin: 0 3px 0 0;
+  color: #888;
+  border-bottom: 1px dashed #999;
+}
+
 .output-canvas {
  flex-shrink: 0;
+  // This fixes a severe painting bug in Chrome.
+  // We should try to remove this once the issue is fixed.
+  // https://bugs.chromium.org/p/chromium/issues/detail?id=870222#c10
+  will-change: auto;
 }
--- a/src/components/checkbox/index.tsx
+++ b/src/components/checkbox/index.tsx
@@ -0,0 +1,20 @@
+import { h, Component } from 'preact';
+import * as style from './style.scss';
+import { UncheckedIcon, CheckedIcon } from '../../lib/icons';
+
+interface Props extends JSX.HTMLAttributes {}
+interface State {}
+
+export default class Checkbox extends Component<Props, State> {
+  render(props: Props) {
+    return (
+      <div class={style.checkbox}>
+        {props.checked
+          ? <CheckedIcon class={`${style.icon} ${style.checked}`} />
+          : <UncheckedIcon class={style.icon} />
+        }
+        <input class={style.realCheckbox} type="checkbox" {...props}/>
+      </div>
+    );
+  }
+}
--- a/src/components/checkbox/style.scss
+++ b/src/components/checkbox/style.scss
@@ -0,0 +1,22 @@
+.checkbox {
+  display: inline-block;
+  position: relative;
+  --size: 17px;
+}
+
+.real-checkbox {
+  top: 0;
+  position: absolute;
+  opacity: 0;
+  pointer-events: none;
+}
+
+.icon {
+  display: block;
+  width: var(--size);
+  height: var(--size);
+}
+
+.checked {
+  fill: #34B9EB;
+}
--- a/src/components/compress/custom-els/MultiPanel/index.ts
+++ b/src/components/compress/custom-els/MultiPanel/index.ts
@@ -1,19 +1,75 @@
-import './styles.css';
+import * as style from './styles.css';
+import { transitionHeight } from '../../../../lib/util';

-function getClosestHeading(el: Element) {
-  const closestEl = el.closest('multi-panel > *');
-  if (closestEl && closestEl.classList.contains('panel-heading')) {
-    return closestEl;
+interface CloseAllOptions {
+  exceptFirst?: boolean;
+}
+
+const openOneOnlyAttr = 'open-one-only';
+
+function getClosestHeading(el: Element): HTMLElement | undefined {
+  // Look for the child of multi-panel, but stop at interactive elements like links & buttons
+  const closestEl = el.closest('multi-panel > *, a, button');
+  if (closestEl && closestEl.classList.contains(style.panelHeading)) {
+    return closestEl as HTMLElement;
  }
  return undefined;
 }

+async function close(heading: HTMLElement) {
+  const content = heading.nextElementSibling as HTMLElement;
+
+  // if there is no content, nothing to expand
+  if (!content) return;
+
+  const from = content.getBoundingClientRect().height;
+
+  heading.removeAttribute('content-expanded');
+  content.setAttribute('aria-expanded', 'false');
+
+  // Wait a microtask so other calls to open/close can get the final sizes.
+  await null;
+
+  await transitionHeight(content, {
+    from,
+    to: 0,
+    duration: 300,
+  });
+
+  content.style.height = '';
+}
+
+async function open(heading: HTMLElement) {
+  const content = heading.nextElementSibling as HTMLElement;
+
+  // if there is no content, nothing to expand
+  if (!content) return;
+
+  const from = content.getBoundingClientRect().height;
+
+  heading.setAttribute('content-expanded', '');
+  content.setAttribute('aria-expanded', 'true');
+
+  const to = content.getBoundingClientRect().height;
+
+  // Wait a microtask so other calls to open/close can get the final sizes.
+  await null;
+
+  await transitionHeight(content, {
+    from, to,
+    duration: 300,
+  });
+
+  content.style.height = '';
+}
+
 /**
 * A multi-panel view that the user can add any number of 'panels'.
 * 'a panel' consists of two elements. Even index element becomes heading,
 * and odd index element becomes the expandable content.
 */
 export default class MultiPanel extends HTMLElement {
+  static get observedAttributes() { return [openOneOnlyAttr]; }

  constructor() {
    super();
@@ -31,12 +87,18 @@ export default class MultiPanel extends HTMLElement {
    this._childrenChange();
  }

+  attributeChangedCallback(name: string, oldValue: string | null, newValue: string | null) {
+    if (name === openOneOnlyAttr && newValue === null) {
+      this._closeAll({ exceptFirst: true });
+    }
+  }
+
  // Click event handler
  private _onClick(event: MouseEvent) {
-    const el = event.target as Element;
+    const el = event.target as HTMLElement;
    const heading = getClosestHeading(el);
    if (!heading) return;
-    this._expand(heading);
+    this._toggle(heading);
  }

  // KeyDown event handler
@@ -53,7 +115,8 @@ export default class MultiPanel extends HTMLElement {
    // don’t handle modifier shortcuts used by assistive technology.
    if (event.altKey) return;

-    let newHeading:HTMLElement | undefined;
+    let newHeading: HTMLElement | undefined;
+
    switch (event.key) {
      case 'ArrowLeft':
      case 'ArrowUp':
@@ -77,7 +140,7 @@ export default class MultiPanel extends HTMLElement {
      case 'Enter':
      case ' ':
      case 'Spacebar':
-        this._expand(heading);
+        this._toggle(heading);
        break;

      // Any other key press is ignored and passed back to the browser.
@@ -93,26 +156,32 @@ export default class MultiPanel extends HTMLElement {
    }
  }

-  private _expand(heading: Element) {
+  private _toggle(heading: HTMLElement) {
    if (!heading) return;
-    const content = heading.nextElementSibling;
-
-    // if there is no content, nothing to expand
-    if (!content) return;

    // toggle expanded and aria-expanded attributes
-    if (content.hasAttribute('expanded')) {
-      content.removeAttribute('expanded');
-      content.setAttribute('aria-expanded', 'false');
+    if (heading.hasAttribute('content-expanded')) {
+      close(heading);
    } else {
-      content.setAttribute('expanded', '');
-      content.setAttribute('aria-expanded', 'true');
+      if (this.openOneOnly) this._closeAll();
+      open(heading);
    }
  }

+  private _closeAll(options: CloseAllOptions = {}): void {
+    const { exceptFirst = false } = options;
+    let els = [...this.children].filter(el => el.matches('[content-expanded]')) as HTMLElement[];
+
+    if (exceptFirst) {
+      els = els.slice(1);
+    }
+
+    for (const el of els) close(el);
+  }
+
  // children of multi-panel should always be even number (heading/content pair)
  private _childrenChange() {
-    let preserveTabIndex : boolean = false;
+    let preserveTabIndex = false;
    let heading = this.firstElementChild;

    while (heading) {
@@ -123,31 +192,23 @@ export default class MultiPanel extends HTMLElement {
      // it means it has odd number of elements. log error and set heading to end the loop.
      if (!content) {
        console.error('<multi-panel> requires an even number of element children.');
-        heading = null;
-        continue;
+        break;
      }

      // When odd number of elements were inserted in the middle,
      // what was heading before may become content after the insertion.
      // Remove classes and attributes to prepare for this change.
-      heading.classList.remove('panel-content');
-
-      if (content.classList.contains('panel-heading')) {
-        content.classList.remove('panel-heading');
-      }
-      if (heading.hasAttribute('expanded') && heading.hasAttribute('aria-expanded')) {
-        heading.removeAttribute('expanded');
-        heading.removeAttribute('aria-expanded');
-      }
+      heading.classList.remove(style.panelContent);
+      content.classList.remove(style.panelHeading);
+      heading.removeAttribute('aria-expanded');
+      heading.removeAttribute('content-expanded');

      // If appreciable, remove tabindex from content which used to be header.
-      if (content.hasAttribute('tabindex')) {
-        content.removeAttribute('tabindex');
-      }
+      content.removeAttribute('tabindex');

      // Assign heading and content classes
-      heading.classList.add('panel-heading');
-      content.classList.add('panel-content');
+      heading.classList.add(style.panelHeading);
+      content.classList.add(style.panelContent);

      // Assign ids and aria-X for heading/content pair.
      heading.id = `panel-heading-${randomId}`;
@@ -163,6 +224,13 @@ export default class MultiPanel extends HTMLElement {
        heading.setAttribute('tabindex', '-1');
      }

+      // It's possible that the heading & content expanded attributes are now out of sync. Resync
+      // them using the heading as the source of truth.
+      content.setAttribute(
+        'aria-expanded',
+        heading.hasAttribute('content-expanded') ? 'true' : 'false',
+      );
+
      // next sibling of content = next heading
      heading = content.nextElementSibling;
    }
@@ -171,6 +239,9 @@ export default class MultiPanel extends HTMLElement {
    if (!preserveTabIndex && this.firstElementChild) {
      this.firstElementChild.setAttribute('tabindex', '0');
    }
+
+    // In case we're openOneOnly, and an additional open item has been added:
+    if (this.openOneOnly) this._closeAll({ exceptFirst: true });
  }

  // returns heading that is before currently selected one.
@@ -208,7 +279,7 @@ export default class MultiPanel extends HTMLElement {
  private _lastHeading() {
    // if the last element is heading, return last element
    const lastEl = this.lastElementChild as HTMLElement;
-    if (lastEl && lastEl.classList.contains('panel-heading')) {
+    if (lastEl && lastEl.classList.contains(style.panelHeading)) {
      return lastEl;
    }
    // otherwise return 2nd from the last
@@ -217,6 +288,21 @@ export default class MultiPanel extends HTMLElement {
      return lastContent.previousElementSibling as HTMLElement;
    }
  }
+
+  /**
+   * If true, only one panel can be open at once. When one opens, others close.
+   */
+  get openOneOnly() {
+    return this.hasAttribute(openOneOnlyAttr);
+  }
+
+  set openOneOnly(val: boolean) {
+    if (val) {
+      this.setAttribute(openOneOnlyAttr, '');
+    } else {
+      this.removeAttribute(openOneOnlyAttr);
+    }
+  }
 }

 customElements.define('multi-panel', MultiPanel);
--- a/src/components/compress/custom-els/MultiPanel/missing-types.d.ts
+++ b/src/components/compress/custom-els/MultiPanel/missing-types.d.ts
@@ -0,0 +1,9 @@
+interface MultiPanelAttributes extends JSX.HTMLAttributes {
+  'open-one-only'?: boolean;
+}
+
+declare namespace JSX {
+  interface IntrinsicElements {
+    'multi-panel': MultiPanelAttributes;
+  }
+}
--- a/src/components/compress/custom-els/MultiPanel/styles.css
+++ b/src/components/compress/custom-els/MultiPanel/styles.css
@@ -0,0 +1,10 @@
+.panel-heading {
+  background: gray;
+}
+.panel-content {
+  height: 0px;
+  overflow: auto;
+}
+.panel-content[aria-expanded=true] {
+  height: auto;
+}
--- a/src/components/compress/index.tsx
+++ b/src/components/compress/index.tsx
@@ -24,18 +24,18 @@ import {
    EncoderOptions,
    encoderMap,
 } from '../../codecs/encoders';
-
 import {
  PreprocessorState,
  defaultPreprocessorState,
 } from '../../codecs/preprocessors';
-
 import { decodeImage } from '../../codecs/decoders';
 import { cleanMerge, cleanSet } from '../../lib/clean-modify';
 import Processor from '../../codecs/processor';
 import { VectorResizeOptions, BitmapResizeOptions } from '../../codecs/resize/processor-meta';
-
-type Orientation = 'horizontal' | 'vertical';
+import './custom-els/MultiPanel';
+import Results from '../results';
+import { ExpandIcon, CopyAcrossIconProps } from '../../lib/icons';
+import SnackBarElement from 'src/lib/SnackBar';

 export interface SourceImage {
  file: File | Fileish;
@@ -59,15 +59,17 @@ interface EncodedImage {

 interface Props {
  file: File | Fileish;
-  onError: (msg: string) => void;
+  showSnack: SnackBarElement['showSnackbar'];
 }

 interface State {
  source?: SourceImage;
  images: [EncodedImage, EncodedImage];
+  /** Source image load */
  loading: boolean;
+  loadingCounter: number;
  error?: string;
-  orientation: Orientation;
+  mobileView: boolean;
 }

 interface UpdateImageOptions {
@@ -135,7 +137,7 @@ async function processSvg(blob: Blob): Promise<HTMLImageElement> {
  const parser = new DOMParser();
  const text = await blobToText(blob);
  const document = parser.parseFromString(text, 'image/svg+xml');
-  const svg = document.documentElement;
+  const svg = document.documentElement!;

  if (svg.hasAttribute('width') && svg.hasAttribute('height')) {
    return blobToImg(blob);
@@ -153,12 +155,19 @@ async function processSvg(blob: Blob): Promise<HTMLImageElement> {
  return blobToImg(new Blob([newSource], { type: 'image/svg+xml' }));
 }

+// These are only used in the mobile view
+const resultTitles = ['Top', 'Bottom'];
+// These are only used in the desktop view
+const buttonPositions =
+  ['download-left', 'download-right'] as ('download-left' | 'download-right')[];
+
 export default class Compress extends Component<Props, State> {
-  widthQuery = window.matchMedia('(min-width: 500px)');
+  widthQuery = window.matchMedia('(max-width: 599px)');

  state: State = {
    source: undefined,
    loading: false,
+    loadingCounter: 0,
    images: [
      {
        preprocessorState: defaultPreprocessorState,
@@ -175,7 +184,7 @@ export default class Compress extends Component<Props, State> {
        loading: false,
      },
    ],
-    orientation: this.widthQuery.matches ? 'horizontal' : 'vertical',
+    mobileView: this.widthQuery.matches,
  };

  private readonly encodeCache = new ResultCache();
@@ -190,7 +199,7 @@ export default class Compress extends Component<Props, State> {

  @bind
  private onMobileWidthChange() {
-    this.setState({ orientation: this.widthQuery.matches ? 'horizontal' : 'vertical' });
+    this.setState({ mobileView: this.widthQuery.matches });
  }

  private onEncoderTypeChange(index: 0 | 1, newType: EncoderType): void {
@@ -242,17 +251,31 @@ export default class Compress extends Component<Props, State> {
    }
  }

-  private onCopyToOtherClick(index: 0 | 1) {
+  private async onCopyToOtherClick(index: 0 | 1) {
    const otherIndex = (index + 1) % 2;
+    const oldSettings = this.state.images[otherIndex];

    this.setState({
      images: cleanSet(this.state.images, otherIndex, this.state.images[index]),
    });
+
+    const result = await this.props.showSnack('Settings copied across', {
+      timeout: 5000,
+      actions: ['undo', 'dismiss'],
+    });
+
+    if (result !== 'undo') return;
+
+    this.setState({
+      images: cleanSet(this.state.images, otherIndex, oldSettings),
+    });
  }

  @bind
  private async updateFile(file: File | Fileish) {
-    this.setState({ loading: true });
+    const loadingCounter = this.state.loadingCounter + 1;
+
+    this.setState({ loadingCounter, loading: true });

    // Abort any current encode jobs, as they're redundant now.
    this.leftProcessor.abortCurrent();
@@ -273,6 +296,9 @@ export default class Compress extends Component<Props, State> {
        data = await decodeImage(file, this.leftProcessor);
      }

+      // Another file has been opened before this one processed.
+      if (this.state.loadingCounter !== loadingCounter) return;
+
      let newState: State = {
        ...this.state,
        source: { data, file, vectorImage },
@@ -303,7 +329,9 @@ export default class Compress extends Component<Props, State> {
    } catch (err) {
      if (err.name === 'AbortError') return;
      console.error(err);
-      this.props.onError('Invalid image');
+      // Another file has been opened before this one processed.
+      if (this.state.loadingCounter !== loadingCounter) return;
+      this.props.showSnack('Invalid image');
      this.setState({ loading: false });
    }
  }
@@ -362,7 +390,7 @@ export default class Compress extends Component<Props, State> {
        }
      } catch (err) {
        if (err.name === 'AbortError') return;
-        this.props.onError(`Processing error (type=${image.encoderState.type}): ${err}`);
+        this.props.showSnack(`Processing error (type=${image.encoderState.type}): ${err}`);
        throw err;
      }
    }
@@ -385,39 +413,73 @@ export default class Compress extends Component<Props, State> {
    this.setState({ images });
  }

-  render({ }: Props, { loading, images, source, orientation }: State) {
+  render({ }: Props, { loading, images, source, mobileView }: State) {
    const [leftImage, rightImage] = images;
    const [leftImageData, rightImageData] = images.map(i => i.data);
-    const anyLoading = loading || images.some(image => image.loading);
+
+    const options = images.map((image, index) => (
+      <Options
+        source={source}
+        mobileView={mobileView}
+        preprocessorState={image.preprocessorState}
+        encoderState={image.encoderState}
+        onEncoderTypeChange={this.onEncoderTypeChange.bind(this, index)}
+        onEncoderOptionsChange={this.onEncoderOptionsChange.bind(this, index)}
+        onPreprocessorOptionsChange={this.onPreprocessorOptionsChange.bind(this, index)}
+      />
+    ));
+
+    const copyDirections =
+      (mobileView ? ['down', 'up'] : ['right', 'left']) as CopyAcrossIconProps['copyDirection'][];
+
+    const results = images.map((image, index) => (
+      <Results
+        downloadUrl={image.downloadUrl}
+        imageFile={image.file}
+        source={source}
+        loading={loading || image.loading}
+        copyDirection={copyDirections[index]}
+        onCopyToOtherClick={this.onCopyToOtherClick.bind(this, index)}
+        buttonPosition={mobileView ? 'stack-right' : buttonPositions[index]}
+      >
+        {!mobileView ? null : [
+          <ExpandIcon class={style.expandIcon} key="expand-icon"/>,
+          `${resultTitles[index]} (${encoderMap[image.encoderState.type].label})`,
+        ]}
+      </Results>
+    ));

    return (
      <div class={style.compress}>
        <Output
          originalImage={source && source.data}
-          orientation={orientation}
+          mobileView={mobileView}
          leftCompressed={leftImageData}
          rightCompressed={rightImageData}
          leftImgContain={leftImage.preprocessorState.resize.fitMethod === 'cover'}
          rightImgContain={rightImage.preprocessorState.resize.fitMethod === 'cover'}
        />
-        <div class={`${style.optionPair} ${style[orientation]}`}>
-          {images.map((image, index) => (
-            <Options
-              source={source}
-              orientation={orientation}
-              imageIndex={index}
-              imageFile={image.file}
-              downloadUrl={image.downloadUrl}
-              preprocessorState={image.preprocessorState}
-              encoderState={image.encoderState}
-              onEncoderTypeChange={this.onEncoderTypeChange.bind(this, index)}
-              onEncoderOptionsChange={this.onEncoderOptionsChange.bind(this, index)}
-              onPreprocessorOptionsChange={this.onPreprocessorOptionsChange.bind(this, index)}
-              onCopyToOtherClick={this.onCopyToOtherClick.bind(this, index)}
-            />
-          ))}
-        </div>
-        {anyLoading && <span style={{ position: 'fixed', top: 0, left: 0 }}>Loading...</span>}
+        {mobileView
+          ? (
+            <div class={style.options}>
+              <multi-panel class={style.multiPanel} open-one-only>
+                {results[0]}
+                {options[0]}
+                {results[1]}
+                {options[1]}
+              </multi-panel>
+            </div>
+          ) : ([
+            <div class={style.options} key="options0">
+              {options[0]}
+              {results[0]}
+            </div>,
+            <div class={style.options} key="options1">
+              {options[1]}
+              {results[1]}
+            </div>,
+          ])
+        }
      </div>
    );
  }
--- a/src/components/compress/style.scss
+++ b/src/components/compress/style.scss
@@ -1,19 +1,74 @@
 .compress {
-  height: 100%;
-}
-
-.option-pair {
-  display: flex;
-  justify-content: flex-end;
  width: 100%;
  height: 100%;
+  contain: strict;
+  display: grid;
+  align-items: end;
+  align-content: end;
+  grid-template-rows: 1fr auto;

-  &.horizontal {
-    justify-content: space-between;
-    align-items: flex-end;
-  }
-
-  &.vertical {
-    flex-direction: column;
+  @media (min-width: 600px) {
+    grid-template-columns: 1fr auto;
+    grid-template-rows: 100%;
  }
 }
+
+.options {
+  color: #fff;
+  opacity: 0.9;
+  font-size: 1.2rem;
+  display: flex;
+  flex-flow: column;
+  max-width: 400px;
+  margin: 0 auto;
+  width: calc(100% - 60px);
+  max-height: calc(100% - 143px);
+  overflow: hidden;
+
+  @media (min-width: 600px) {
+    max-height: calc(100% - 75px);
+    width: 300px;
+    margin: 0;
+  }
+
+  @media (min-width: 860px) {
+    max-height: 100%;
+  }
+}
+
+.multi-panel {
+  position: relative;
+  display: flex;
+  flex-flow: column;
+
+  // Reorder so headings appear after content:
+  & > :nth-child(1) {
+    order: 2;
+    margin-bottom: 10px;
+  }
+
+  & > :nth-child(2) {
+    order: 1;
+  }
+
+  & > :nth-child(3) {
+    order: 4;
+  }
+
+  & > :nth-child(4) {
+    order: 3;
+  }
+}
+
+.expand-icon {
+  transform: rotate(180deg);
+  margin-left: -12px;
+}
+
+[content-expanded] .expand-icon {
+  transform: none;
+}
+
+:focus .expand-icon {
+  fill: #34B9EB;
+}
--- a/src/components/expander/index.tsx
+++ b/src/components/expander/index.tsx
@@ -0,0 +1,71 @@
+import { h, Component, ComponentChild, ComponentChildren } from 'preact';
+import * as style from './style.scss';
+import { transitionHeight } from '../../lib/util';
+
+interface Props {
+  children: ComponentChildren;
+}
+interface State {
+  outgoingChildren: ComponentChild[];
+}
+
+export default class Expander extends Component<Props, State> {
+  state: State = {
+    outgoingChildren: [],
+  };
+  private lastElHeight: number = 0;
+
+  componentWillReceiveProps(nextProps: Props) {
+    const children = this.props.children as ComponentChild[];
+    const nextChildren = nextProps.children as ComponentChild[];
+
+    if (!nextChildren[0] && children[0]) {
+      // Cache the current children for the shrink animation.
+      this.setState({ outgoingChildren: children });
+    }
+  }
+
+  componentWillUpdate(nextProps: Props) {
+    const children = this.props.children as ComponentChild[];
+    const nextChildren = nextProps.children as ComponentChild[];
+
+    // Only interested if going from empty to not-empty, or not-empty to empty.
+    if ((children[0] && nextChildren[0]) || (!children[0] && !nextChildren[0])) return;
+    this.lastElHeight = this.base!.getBoundingClientRect().height;
+  }
+
+  async componentDidUpdate(previousProps: Props) {
+    const children = this.props.children as ComponentChild[];
+    const previousChildren = previousProps.children as ComponentChild[];
+
+    // Only interested if going from empty to not-empty, or not-empty to empty.
+    if ((children[0] && previousChildren[0]) || (!children[0] && !previousChildren[0])) return;
+
+    // What height do we need to transition to?
+    this.base!.style.height = '';
+    this.base!.style.overflow = 'hidden';
+    const newHeight = children[0] ? this.base!.getBoundingClientRect().height : 0;
+
+    await transitionHeight(this.base!, {
+      duration: 300,
+      from: this.lastElHeight,
+      to: newHeight,
+    });
+
+    // Unset the height & overflow, so element changes do the right thing.
+    this.base!.style.height = '';
+    this.base!.style.overflow = '';
+    if (this.state.outgoingChildren[0]) this.setState({ outgoingChildren: [] });
+  }
+
+  render(props: Props, { outgoingChildren }: State) {
+    const children = props.children as ComponentChild[];
+    const childrenExiting = !children[0] && outgoingChildren[0];
+
+    return (
+      <div class={childrenExiting ? style.childrenExiting : ''}>
+        {children[0] ? children : outgoingChildren}
+      </div>
+    );
+  }
+}
--- a/src/components/expander/style.scss
+++ b/src/components/expander/style.scss
@@ -0,0 +1,5 @@
+.children-exiting {
+  & > * {
+    pointer-events: none;
+  }
+}
--- a/src/components/intro/index.tsx
+++ b/src/components/intro/index.tsx
@@ -12,6 +12,7 @@ import artworkIcon from './imgs/demos/artwork-icon.jpg';
 import deviceScreenIcon from './imgs/demos/device-screen-icon.jpg';
 import logoIcon from './imgs/demos/logo-icon.png';
 import * as style from './style.scss';
+import SnackBarElement from '../../lib/SnackBar';

 const demos = [
  {
@@ -42,7 +43,7 @@ const demos = [

 interface Props {
  onFile: (file: File | Fileish) => void;
-  onError: (error: string) => void;
+  showSnack: SnackBarElement['showSnackbar'];
 }
 interface State {
  fetchingDemoIndex?: number;
@@ -79,7 +80,7 @@ export default class Intro extends Component<Props, State> {
      this.props.onFile(file);
    } catch (err) {
      this.setState({ fetchingDemoIndex: undefined });
-      this.props.onError("Couldn't fetch demo image");
+      this.props.showSnack("Couldn't fetch demo image");
    }
  }

--- a/src/components/output/custom-els/MultiPanel/styles.css
+++ b/src/components/output/custom-els/MultiPanel/styles.css
@@ -1,11 +0,0 @@
-multi-panel > .panel-heading {
-  background:gray;
-}
-multi-panel > .panel-content {
-  height:0px;
-  overflow:scroll;
-  transition: height 1s;
-}
-multi-panel > .panel-content[expanded] {
-  height:auto;
-}
--- a/src/components/range/index.tsx
+++ b/src/components/range/index.tsx
@@ -0,0 +1,55 @@
+import { h, Component } from 'preact';
+import * as style from './style.scss';
+import RangeInputElement from '../../custom-els/RangeInput';
+import '../../custom-els/RangeInput';
+import { linkRef, bind } from '../../lib/initial-util';
+
+interface Props extends JSX.HTMLAttributes {}
+interface State {}
+
+export default class Range extends Component<Props, State> {
+  rangeWc?: RangeInputElement;
+
+  @bind
+  private onTextInput(event: Event) {
+    const input = event.target as HTMLInputElement;
+    this.rangeWc!.value = input.value;
+    const { onInput } = this.props;
+    if (onInput) onInput(event);
+  }
+
+  render(props: Props) {
+    const {
+      children,
+      ...otherProps
+    } = props;
+
+    const {
+      value, min, max, step,
+    } = props;
+
+    return (
+      <label class={style.range}>
+        <span class={style.labelText}>{children}</span>
+        {/* On interaction, Safari gives focus to the first element in the label, so the
+        <range-input> is deliberately first. */}
+        <div class={style.rangeWcContainer}>
+          <range-input
+            ref={linkRef(this, 'rangeWc')}
+            class={style.rangeWc}
+            {...otherProps}
+          />
+        </div>
+        <input
+          type="number"
+          class={style.textInput}
+          value={value}
+          min={min}
+          max={max}
+          step={step}
+          onInput={this.onTextInput}
+        />
+      </label>
+    );
+  }
+}
--- a/src/components/range/style.scss
+++ b/src/components/range/style.scss
@@ -0,0 +1,55 @@
+.range {
+  position: relative;
+  z-index: 0;
+  display: grid;
+  grid-template-columns: 1fr auto;
+}
+
+.label-text {
+  color: #fff; /* TEMP */
+}
+
+.range-wc-container {
+  position: relative;
+  z-index: 1;
+  grid-row: 2 / 3;
+  grid-column: 1 / 3;
+}
+
+.range-wc {
+  width: 100%;
+}
+
+.text-input {
+  grid-row: 1 / 2;
+  grid-column: 2 / 3;
+
+  text-align: right;
+  background: transparent;
+  color: inherit;
+  font: inherit;
+  border: none;
+  padding: 2px 5px;
+  box-sizing: border-box;
+  text-decoration: underline;
+  text-decoration-style: dotted;
+  text-underline-position: under;
+  width: 48px;
+  position: relative;
+  left: 5px;
+
+  &:focus {
+    background: #fff;
+    color: #000;
+  }
+
+  // Remove the number controls
+  -moz-appearance: textfield;
+
+  &::-webkit-outer-spin-button,
+  &::-webkit-inner-spin-button {
+    -moz-appearance: none;
+    -webkit-appearance: none;
+    margin: 0;
+  }
+}
--- a/src/components/results/FileSize.tsx
+++ b/src/components/results/FileSize.tsx
@@ -0,0 +1,41 @@
+import { h, Component } from 'preact';
+import * as prettyBytes from 'pretty-bytes';
+import * as style from './style.scss';
+
+interface Props {
+  blob: Blob;
+  compareTo?: Blob;
+}
+
+interface State {}
+
+export default class FileSize extends Component<Props, State> {
+  render({ blob, compareTo }: Props) {
+    let comparison: JSX.Element | undefined;
+
+    if (compareTo) {
+      const delta = blob.size / compareTo.size;
+      if (delta > 1) {
+        const percent = Math.round((delta - 1) * 100) + '%';
+        comparison = (
+          <span class={`${style.sizeDelta} ${style.sizeIncrease}`}>
+            {percent === '0%' ? 'slightly' : percent} bigger
+          </span>
+        );
+      } else if (delta < 1) {
+        const percent = Math.round((1 - delta) * 100) + '%';
+        comparison = (
+          <span class={`${style.sizeDelta} ${style.sizeDecrease}`}>
+            {percent === '0%' ? 'slightly' : percent} smaller
+          </span>
+        );
+      } else {
+        comparison = (
+          <span class={style.sizeDelta}>no change</span>
+        );
+      }
+    }
+
+    return <span>{prettyBytes(blob.size)} {comparison}</span>;
+  }
+}
--- a/src/components/results/index.tsx
+++ b/src/components/results/index.tsx
@@ -0,0 +1,105 @@
+import { h, Component, ComponentChildren, ComponentChild } from 'preact';
+
+import * as style from './style.scss';
+import FileSize from './FileSize';
+import { DownloadIcon, CopyAcrossIcon, CopyAcrossIconProps } from '../../lib/icons';
+import '../custom-els/LoadingSpinner';
+import { SourceImage } from '../compress';
+import { Fileish, bind } from '../../lib/initial-util';
+
+interface Props {
+  loading: boolean;
+  source?: SourceImage;
+  imageFile?: Fileish;
+  downloadUrl?: string;
+  children: ComponentChildren;
+  copyDirection: CopyAcrossIconProps['copyDirection'];
+  buttonPosition: keyof typeof buttonPositionClass;
+  onCopyToOtherClick(): void;
+}
+
+interface State {
+  showLoadingState: boolean;
+}
+
+const buttonPositionClass = {
+  'stack-right': style.stackRight,
+  'download-right': style.downloadRight,
+  'download-left': style.downloadLeft,
+};
+
+const loadingReactionDelay = 500;
+
+export default class Results extends Component<Props, State> {
+  state: State = {
+    showLoadingState: false,
+  };
+
+  /** The timeout ID between entering the loading state, and changing UI */
+  private loadingTimeoutId: number = 0;
+
+  componentDidUpdate(prevProps: Props, prevState: State) {
+    if (prevProps.loading && !this.props.loading) {
+      // Just stopped loading
+      clearTimeout(this.loadingTimeoutId);
+      this.setState({ showLoadingState: false });
+    } else if (!prevProps.loading && this.props.loading) {
+      // Just started loading
+      this.loadingTimeoutId = self.setTimeout(
+        () => this.setState({ showLoadingState: true }),
+        loadingReactionDelay,
+      );
+    }
+  }
+
+  @bind
+  private onCopyToOtherClick(event: Event) {
+    event.preventDefault();
+    this.props.onCopyToOtherClick();
+  }
+
+  render(
+    { source, imageFile, downloadUrl, children, copyDirection, buttonPosition }: Props,
+    { showLoadingState }: State,
+  ) {
+
+    return (
+      <div class={`${style.results} ${buttonPositionClass[buttonPosition]}`}>
+        <div class={style.resultData}>
+          {(children as ComponentChild[])[0]
+            ? <div class={style.resultTitle}>{children}</div>
+            : null
+          }
+          {!imageFile || showLoadingState ? 'Working…' :
+            <FileSize
+              blob={imageFile}
+              compareTo={(source && imageFile !== source.file) ? source.file : undefined}
+            />
+          }
+        </div>
+
+        <button
+          class={style.copyToOther}
+          title="Copy settings to other side"
+          onClick={this.onCopyToOtherClick}
+        >
+          <CopyAcrossIcon class={style.copyIcon} copyDirection={copyDirection} />
+        </button>
+
+        <div class={style.download}>
+          {(downloadUrl && imageFile) && (
+            <a
+              class={`${style.downloadLink} ${showLoadingState ? style.downloadLinkDisable : ''}`}
+              href={downloadUrl}
+              download={imageFile.name}
+              title="Download"
+            >
+              <DownloadIcon class={style.downloadIcon} />
+            </a>
+          )}
+          {showLoadingState && <loading-spinner class={style.spinner} />}
+        </div>
+      </div>
+    );
+  }
+}
--- a/src/components/results/style.scss
+++ b/src/components/results/style.scss
@@ -0,0 +1,131 @@
+@keyframes action-enter {
+  from {
+    transform: rotate(-90deg);
+    opacity: 0;
+    animation-timing-function: ease-out;
+  }
+}
+
+@keyframes action-leave {
+  from {
+    transform: rotate(0deg);
+    opacity: 1;
+    animation-timing-function: ease-out;
+  }
+}
+
+.results {
+  display: grid;
+  grid-template-columns: [text] 1fr [copy-button] auto [download-button] auto;
+  background: rgba(0, 0, 0, 0.9);
+  font-size: 1rem;
+
+  @media (min-width: 400px) {
+    font-size: 1.2rem;
+  }
+
+  @media (min-width: 600px) {
+    font-size: 1.4rem;
+  }
+
+  &:focus {
+    outline: none;
+  }
+}
+
+.result-data {
+  grid-row: 1;
+  grid-column: text;
+  display: flex;
+  align-items: center;
+  padding: 0 10px;
+  white-space: nowrap;
+  overflow: hidden;
+}
+
+.download-right {
+  grid-template-columns: [copy-button] auto [text] 1fr [download-button] auto;
+}
+
+.download-left {
+  grid-template-columns: [download-button] auto [text] 1fr [copy-button] auto;
+}
+
+.stack-right {
+  & .result-data {
+    padding: 0 15px;
+  }
+}
+
+.result-title {
+  display: flex;
+  align-items: center;
+  margin-right: 0.4em;
+}
+
+.size-delta {
+  font-size: 0.8em;
+  font-style: italic;
+  position: relative;
+  top: -1px;
+  margin-left: 0.3em;
+}
+
+.size-increase {
+  color: #e35050;
+}
+
+.size-decrease {
+  color: #50e3c2;
+}
+
+.download {
+  grid-row: 1;
+  grid-column: download-button;
+  background: #34B9EB;
+  --size: 38px;
+  width: var(--size);
+  height: var(--size);
+  display: grid;
+  align-items: center;
+  justify-items: center;
+}
+
+.download-link {
+  animation: action-enter 0.2s;
+  grid-area: 1/1;
+}
+
+.download-link-disable {
+  pointer-events: none;
+  opacity: 0;
+  transform: rotate(90deg);
+  animation: action-leave 0.2s;
+}
+
+.download-icon,
+.copy-icon {
+  color: #fff;
+  display: block;
+  --size: 24px;
+  width: var(--size);
+  height: var(--size);
+  padding: 7px;
+  filter: drop-shadow(0 1px 0 rgba(0, 0, 0, 0.7));
+}
+
+.spinner {
+  --color: #fff;
+  --delay: 0;
+  --size: 22px;
+  grid-area: 1/1;
+}
+
+.copy-to-other {
+  grid-row: 1;
+  grid-column: copy-button;
+  composes: unbutton from '../../lib/util.scss';
+  composes: download;
+
+  background: #656565;
+}
--- a/src/components/select/index.tsx
+++ b/src/components/select/index.tsx
@@ -0,0 +1,20 @@
+import { h, Component } from 'preact';
+import * as style from './style.scss';
+
+interface Props extends JSX.HTMLAttributes {
+  large?: boolean;
+}
+interface State {}
+
+export default class Select extends Component<Props, State> {
+  render(props: Props) {
+    const { large, ...otherProps } = props;
+
+    return (
+      <div class={style.select}>
+        <select class={`${style.nativeSelect} ${large ? style.large : ''}`} {...otherProps}/>
+        <svg class={style.arrow} viewBox="0 0 10 5"><path d="M0 0l5 5 5-5z"/></svg>
+      </div>
+    );
+  }
+}
--- a/src/components/select/style.scss
+++ b/src/components/select/style.scss
@@ -0,0 +1,33 @@
+.select {
+  position: relative;
+}
+
+.native-select {
+  background: #2f2f2f;
+  border-radius: 4px;
+  font: inherit;
+  padding: 4px 25px 4px 10px;
+  -webkit-appearance: none;
+  -moz-appearance: none;
+  border: none;
+  color: #fff;
+  width: 100%;
+}
+
+.arrow {
+  position: absolute;
+  right: 8px;
+  top: 50%;
+  transform: translateY(-50%);
+  fill: #fff;
+  width: 10px;
+}
+
+.large {
+  padding: 10px 35px 10px 10px;
+  background: #151515;
+
+  & .arrow {
+    right: 13px;
+  }
+}
--- a/src/custom-els/RangeInput/index.ts
+++ b/src/custom-els/RangeInput/index.ts
@@ -1,15 +1,20 @@
+import PointerTracker from 'pointer-tracker';
 import { bind } from '../../lib/initial-util';
-import './styles.css';
+import * as style from './styles.css';

 const RETARGETED_EVENTS = ['focus', 'blur'];
 const UPDATE_EVENTS = ['input', 'change'];
 const REFLECTED_PROPERTIES = ['name', 'min', 'max', 'step', 'value', 'disabled'];
 const REFLECTED_ATTRIBUTES = ['name', 'min', 'max', 'step', 'value', 'disabled'];

+function getPrescision(value: string): number {
+  const afterDecimal = value.split('.')[1];
+  return afterDecimal ? afterDecimal.length : 0;
+}
+
 class RangeInputElement extends HTMLElement {
-  private _input = document.createElement('input');
-  private _valueDisplayWrapper = document.createElement('div');
-  private _valueDisplay = document.createElement('span');
+  private _input: HTMLInputElement;
+  private _valueDisplay?: HTMLDivElement;
  private _ignoreChange = false;

  static get observedAttributes() {
@@ -18,7 +23,20 @@ class RangeInputElement extends HTMLElement {

  constructor() {
    super();
+    this._input = document.createElement('input');
    this._input.type = 'range';
+    this._input.className = style.input;
+
+    const tracker = new PointerTracker(this._input, {
+      start: (): boolean => {
+        if (tracker.currentPointers.length !== 0) return false;
+        this._input.classList.add(style.touchActive);
+        return true;
+      },
+      end: () => {
+        this._input.classList.remove(style.touchActive);
+      },
+    });

    for (const event of RETARGETED_EVENTS) {
      this._input.addEventListener(event, this._retargetEvent, true);
@@ -29,6 +47,20 @@ class RangeInputElement extends HTMLElement {
    }
  }

+  connectedCallback() {
+    if (this.contains(this._input)) return;
+    this.innerHTML =
+      `<div class="${style.thumbWrapper}">` +
+        `<div class="${style.thumb}"></div>` +
+        `<div class="${style.valueDisplay}"></div>` +
+      '</div>';
+
+    this.insertBefore(this._input, this.firstChild);
+    this._valueDisplay = this.querySelector('.' + style.valueDisplay) as HTMLDivElement;
+    // Set inline styles (this is useful when used with frameworks which might clear inline styles)
+    this._update();
+  }
+
  get labelPrecision(): string {
    return this.getAttribute('label-precision') || '';
  }
@@ -37,14 +69,6 @@ class RangeInputElement extends HTMLElement {
    this.setAttribute('label-precision', precision);
  }

-  connectedCallback() {
-    if (this._input.parentNode !== this) {
-      this.appendChild(this._input);
-      this._valueDisplayWrapper.appendChild(this._valueDisplay);
-      this.appendChild(this._valueDisplayWrapper);
-    }
-  }
-
  attributeChangedCallback(name: string, oldValue: string, newValue: string | null) {
    if (this._ignoreChange) return;
    if (newValue === null) {
@@ -65,15 +89,15 @@ class RangeInputElement extends HTMLElement {

  @bind
  private _update() {
-    const value = parseFloat(this.value || '0');
-    const min = parseFloat(this.min || '0');
-    const max = parseFloat(this.max || '100');
-    const labelPrecision = parseFloat(this.labelPrecision || '0');
+    const value = Number(this.value) || 0;
+    const min = Number(this.min) || 0;
+    const max = Number(this.max) || 100;
+    const labelPrecision = Number(this.labelPrecision) || getPrescision(this.step) || 0;
    const percent = 100 * (value - min) / (max - min);
-    const displayValue = labelPrecision ? value.toPrecision(labelPrecision) :
+    const displayValue = labelPrecision ? value.toFixed(labelPrecision) :
      Math.round(value).toString();

-    this._valueDisplay.textContent = displayValue;
+    this._valueDisplay!.textContent = displayValue;
    this.style.setProperty('--value-percent', percent + '%');
    this.style.setProperty('--value-width', '' + displayValue.length);
  }
--- a/src/custom-els/RangeInput/missing-types.d.ts
+++ b/src/custom-els/RangeInput/missing-types.d.ts
@@ -1,9 +1,5 @@
 declare namespace JSX {
-  interface RangeInputAttributes extends HTMLAttributes {
-    reversed?: boolean;
-  }
-
  interface IntrinsicElements {
-    'range-input': RangeInputAttributes;
+    'range-input': HTMLAttributes;
  }
 }
--- a/src/custom-els/RangeInput/styles.css
+++ b/src/custom-els/RangeInput/styles.css
@@ -14,41 +14,6 @@ range-input[disabled] {
  filter: grayscale(1);
 }

-/* Reversed Variant */
-range-input[reversed] input,
-range-input[reversed]::before,
-range-input[reversed] > div {
-  transform: scaleX(-1);
-}
-range-input[reversed] > div > span {
-  transform: scaleX(-1) scale(.2);
-}
-range-input[reversed] input:focus + div span {
-  transform: scaleX(-1) scale(1);
-}
-
-
-range-input input {
-  position: relative;
-  flex: 1;
-  vertical-align: middle;
-  width: 100%;
-  padding: 0 !important;
-  margin: 0 !important;
-  background: none;
-  appearance: none;
-  -webkit-appearance: none;
-  outline: none;
-}
-range-input input::-webkit-slider-runnable-track,
-range-input input::-moz-range-track,
-range-input input::-ms-track {
-  appearance: none;
-  -ms-appearance: none;
-  -moz-appearance: none;
-  -webkit-appearance: none;
-}
-
 range-input::before {
  content: '';
  display: block;
@@ -57,32 +22,33 @@ range-input::before {
  left: 0;
  width: 100%;
  height: 2px;
-  outline: none;
-  border: none;
-  background: #eee;
  border-radius: 1px;
  box-shadow: 0 -.5px 0 rgba(0,0,0,0.3), inset 0 .5px 0 rgba(255,255,255,0.2), 0 .5px 0 rgba(255,255,255,0.3);
  background: linear-gradient(#34B9EB, #218ab1) 0/ var(--value-percent, 0%) 100% no-repeat #eee;
 }

-range-input input::-webkit-slider-thumb {
-  appearance: none;
-  -webkit-appearance: none;
-  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="10" height="10"><circle cx="5" cy="5" r="1" fill="#5D509E" /></svg>') center no-repeat #34B9EB;
-  box-sizing: content-box;
+.input {
+  position: relative;
+  width: 100%;
+  padding: 0;
+  margin: 0;
+  opacity: 0;
+}
+
+.thumb {
+  pointer-events: none;
+  position: absolute;
+  bottom: 3px;
+  left: var(--value-percent, 0%);
+  margin-left: -6px;
+  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="10" height="10"><circle cx="5" cy="5" r="1" fill="%235D509E" /></svg>') center no-repeat #34B9EB;
  border-radius: 50%;
  width: 12px;
  height: 12px;
-  border: none;
  box-shadow: 0 0.5px 2px rgba(0,0,0,0.3);
-  outline: none;
 }

-range-input input:focus::-webkit-slider-thumb {
-  box-shadow: 0 1px 3px rgba(0,0,0,0.5);
-}
-
-range-input > div {
+.thumb-wrapper {
  position: absolute;
  left: 6px;
  right: 6px;
@@ -91,8 +57,8 @@ range-input > div {
  overflow: visible;
 }

-range-input > div > span {
-  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="32" height="62" fill="none"><path fill="#34B9EB" d="M27.3 27.3C25 29.6 17 35.8 17 43v3c0 3 2.5 5 3.2 5.8a6 6 0 1 1-8.5 0C12.6 51 15 49 15 46v-3c0-7.2-8-13.4-10.3-15.7A16 16 0 0 1 16 0a16 16 0 0 1 11.3 27.3z"/><circle cx="16" cy="56" r="1" fill="#5D509E"/></svg>') top center no-repeat;
+.value-display {
+  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="32" height="62" fill="none"><path fill="%2334B9EB" d="M27.3 27.3C25 29.6 17 35.8 17 43v3c0 3 2.5 5 3.2 5.8a6 6 0 1 1-8.5 0C12.6 51 15 49 15 46v-3c0-7.2-8-13.4-10.3-15.7A16 16 0 0 1 16 0a16 16 0 0 1 11.3 27.3z"/><circle cx="16" cy="56" r="1" fill="%235D509E"/></svg>') top center no-repeat;
  position: absolute;
  box-sizing: border-box;
  left: var(--value-percent, 0%);
@@ -111,12 +77,18 @@ range-input > div > span {
  font-size: calc(100% - var(--value-width, 3) / 5 * .2em);
  text-overflow: clip;
  text-shadow: 0 -.5px 0 rgba(0,0,0,0.4);
-  transition: transform 200ms ease, opacity 200ms ease;
+  transition: all 200ms ease;
+  transition-property: opacity, transform;
  will-change: transform;
  pointer-events: none;
  overflow: hidden;
 }
-range-input input:focus + div span {
+
+.touch-active + .thumb-wrapper .value-display {
  opacity: 1;
  transform: scale(1);
 }
+
+.touch-active + .thumb-wrapper .thumb {
+  box-shadow: 0 1px 3px rgba(0,0,0,0.5);
+}
--- a/src/init-app.tsx
+++ b/src/init-app.tsx
@@ -16,6 +16,7 @@ if (process.env.NODE_ENV === 'development') {

  // When an update to any module is received, re-import the app and trigger a full re-render:
  module.hot.accept('./components/App', () => {
+    // The linter doesn't like the capital A in App. It is wrong.
    // tslint:disable-next-line variable-name
    import('./components/App').then(({ default: App }) => {
      root = render(<App />, document.body, root);
--- a/src/lib/PointerTracker/index.ts
+++ b/src/lib/PointerTracker/index.ts
@@ -1,255 +0,0 @@
-import { bind } from '../../lib/initial-util';
-const enum Button { Left }
-
-export class Pointer {
-  /** x offset from the top of the document */
-  pageX: number;
-  /** y offset from the top of the document */
-  pageY: number;
-  /** x offset from the top of the viewport */
-  clientX: number;
-  /** y offset from the top of the viewport */
-  clientY: number;
-  /** ID for this pointer */
-  id: number = -1;
-  /** The platform object used to create this Pointer */
-  nativePointer: Touch | PointerEvent | MouseEvent;
-
-  constructor (nativePointer: Touch | PointerEvent | MouseEvent) {
-    this.nativePointer = nativePointer;
-    this.pageX = nativePointer.pageX;
-    this.pageY = nativePointer.pageY;
-    this.clientX = nativePointer.clientX;
-    this.clientY = nativePointer.clientY;
-
-    if (self.Touch && nativePointer instanceof Touch) {
-      this.id = nativePointer.identifier;
-    } else if (isPointerEvent(nativePointer)) { // is PointerEvent
-      this.id = nativePointer.pointerId;
-    }
-  }
-
-  /**
-   * Returns an expanded set of Pointers for high-resolution inputs.
-   */
-  getCoalesced(): Pointer[] {
-    if ('getCoalescedEvents' in this.nativePointer) {
-      return this.nativePointer.getCoalescedEvents().map(p => new Pointer(p));
-    }
-    return [this];
-  }
-}
-
-const isPointerEvent = (event: any): event is PointerEvent =>
-  self.PointerEvent && event instanceof PointerEvent;
-
-const noop = () => {};
-
-export type InputEvent = TouchEvent | PointerEvent | MouseEvent;
-type StartCallback = (pointer: Pointer, event: InputEvent) => boolean;
-type MoveCallback = (
-  previousPointers: Pointer[],
-  changedPointers: Pointer[],
-  event: InputEvent,
-) => void;
-type EndCallback = (pointer: Pointer, event: InputEvent) => void;
-
-interface PointerTrackerCallbacks {
-  /**
-   * Called when a pointer is pressed/touched within the element.
-   *
-   * @param pointer The new pointer.
-   * This pointer isn't included in this.currentPointers or this.startPointers yet.
-   * @param event The event related to this pointer.
-   *
-   * @returns Whether you want to track this pointer as it moves.
-   */
-  start?: StartCallback;
-  /**
-   * Called when pointers have moved.
-   *
-   * @param previousPointers The state of the pointers before this event.
-   * This contains the same number of pointers, in the same order, as
-   * this.currentPointers and this.startPointers.
-   * @param changedPointers The pointers that have changed since the last move callback.
-   * @param event The event related to the pointer changes.
-   */
-  move?: MoveCallback;
-  /**
-   * Called when a pointer is released.
-   *
-   * @param pointer The final state of the pointer that ended. This
-   * pointer is now absent from this.currentPointers and
-   * this.startPointers.
-   * @param event The event related to this pointer.
-   */
-  end?: EndCallback;
-}
-
-/**
- * Track pointers across a particular element
- */
-export class PointerTracker {
-  /**
-   * State of the tracked pointers when they were pressed/touched.
-   */
-  readonly startPointers: Pointer[] = [];
-  /**
-   * Latest state of the tracked pointers. Contains the same number
-   * of pointers, and in the same order as this.startPointers.
-   */
-  readonly currentPointers: Pointer[] = [];
-
-  private _startCallback: StartCallback;
-  private _moveCallback: MoveCallback;
-  private _endCallback: EndCallback;
-
-  /**
-   * Track pointers across a particular element
-   *
-   * @param element Element to monitor.
-   * @param callbacks
-   */
-  constructor (private _element: HTMLElement, callbacks: PointerTrackerCallbacks) {
-    const {
-      start = () => true,
-      move = noop,
-      end = noop,
-    } = callbacks;
-
-    this._startCallback = start;
-    this._moveCallback = move;
-    this._endCallback = end;
-
-    // Add listeners
-    if (self.PointerEvent) {
-      this._element.addEventListener('pointerdown', this._pointerStart);
-    } else {
-      this._element.addEventListener('mousedown', this._pointerStart);
-      this._element.addEventListener('touchstart', this._touchStart);
-      this._element.addEventListener('touchmove', this._move);
-      this._element.addEventListener('touchend', this._touchEnd);
-    }
-  }
-
-  /**
-   * Call the start callback for this pointer, and track it if the user wants.
-   *
-   * @param pointer Pointer
-   * @param event Related event
-   * @returns Whether the pointer is being tracked.
-   */
-  private _triggerPointerStart (pointer: Pointer, event: InputEvent): boolean {
-    if (!this._startCallback(pointer, event)) return false;
-    this.currentPointers.push(pointer);
-    this.startPointers.push(pointer);
-    return true;
-  }
-
-  /**
-   * Listener for mouse/pointer starts. Bound to the class in the constructor.
-   *
-   * @param event This will only be a MouseEvent if the browser doesn't support
-   * pointer events.
-   */
-  @bind
-  private _pointerStart (event: PointerEvent | MouseEvent) {
-    if (event.button !== Button.Left) return;
-    if (!this._triggerPointerStart(new Pointer(event), event)) return;
-
-    // Add listeners for additional events.
-    // The listeners may already exist, but no harm in adding them again.
-    if (isPointerEvent(event)) {
-      this._element.setPointerCapture(event.pointerId);
-      this._element.addEventListener('pointermove', this._move);
-      this._element.addEventListener('pointerup', this._pointerEnd);
-    } else { // MouseEvent
-      window.addEventListener('mousemove', this._move);
-      window.addEventListener('mouseup', this._pointerEnd);
-    }
-  }
-
-  /**
-   * Listener for touchstart. Bound to the class in the constructor.
-   * Only used if the browser doesn't support pointer events.
-   */
-  @bind
-  private _touchStart (event: TouchEvent) {
-    for (const touch of Array.from(event.changedTouches)) {
-      this._triggerPointerStart(new Pointer(touch), event);
-    }
-  }
-
-  /**
-   * Listener for pointer/mouse/touch move events.
-   * Bound to the class in the constructor.
-   */
-  @bind
-  private _move (event: PointerEvent | MouseEvent | TouchEvent) {
-    const previousPointers = this.currentPointers.slice();
-    const changedPointers = ('changedTouches' in event) ? // Shortcut for 'is touch event'.
-      Array.from(event.changedTouches).map(t => new Pointer(t)) :
-      [new Pointer(event)];
-    const trackedChangedPointers = [];
-
-    for (const pointer of changedPointers) {
-      const index = this.currentPointers.findIndex(p => p.id === pointer.id);
-      if (index === -1) continue; // Not a pointer we're tracking
-      trackedChangedPointers.push(pointer);
-      this.currentPointers[index] = pointer;
-    }
-
-    if (trackedChangedPointers.length === 0) return;
-
-    this._moveCallback(previousPointers, trackedChangedPointers, event);
-  }
-
-  /**
-   * Call the end callback for this pointer.
-   *
-   * @param pointer Pointer
-   * @param event Related event
-   */
-  @bind
-  private _triggerPointerEnd (pointer: Pointer, event: InputEvent): boolean {
-    const index = this.currentPointers.findIndex(p => p.id === pointer.id);
-    // Not a pointer we're interested in?
-    if (index === -1) return false;
-
-    this.currentPointers.splice(index, 1);
-    this.startPointers.splice(index, 1);
-
-    this._endCallback(pointer, event);
-    return true;
-  }
-
-  /**
-   * Listener for mouse/pointer ends. Bound to the class in the constructor.
-   * @param event This will only be a MouseEvent if the browser doesn't support
-   * pointer events.
-   */
-  @bind
-  private _pointerEnd (event: PointerEvent | MouseEvent) {
-    if (!this._triggerPointerEnd(new Pointer(event), event)) return;
-
-    if (isPointerEvent(event)) {
-      if (this.currentPointers.length) return;
-      this._element.removeEventListener('pointermove', this._move);
-      this._element.removeEventListener('pointerup', this._pointerEnd);
-    } else { // MouseEvent
-      window.removeEventListener('mousemove', this._move);
-      window.removeEventListener('mouseup', this._pointerEnd);
-    }
-  }
-
-  /**
-   * Listener for touchend. Bound to the class in the constructor.
-   * Only used if the browser doesn't support pointer events.
-   */
-  @bind
-  private _touchEnd (event: TouchEvent) {
-    for (const touch of Array.from(event.changedTouches)) {
-      this._triggerPointerEnd(new Pointer(touch), event);
-    }
-  }
-}
--- a/src/lib/PointerTracker/missing-types.d.ts
+++ b/src/lib/PointerTracker/missing-types.d.ts
@@ -1,10 +0,0 @@
-// TypeScript, you make me sad.
-// https://github.com/Microsoft/TypeScript/issues/18756
-interface Window {
-  PointerEvent: typeof PointerEvent;
-  Touch: typeof Touch;
-}
-
-interface PointerEvent {
-  getCoalescedEvents(): PointerEvent[];
-}
--- a/src/lib/SnackBar/index.ts
+++ b/src/lib/SnackBar/index.ts
@@ -1,114 +1,96 @@
-import './styles.css';
-
-const DEFAULT_TIMEOUT = 2750;
+import * as style from './styles.css';

 export interface SnackOptions {
-  message: string;
  timeout?: number;
-  actionText?: string;
-  actionHandler?: () => boolean | null;
+  actions?: string[];
 }

-export interface SnackShowResult {
-  action: boolean;
-}
+function createSnack(message: string, options: SnackOptions): [Element, Promise<string>] {
+  const {
+    timeout = 0,
+    actions = [],
+  } = options;

-class Snack {
-  private _onremove: ((result: SnackShowResult) => void)[] = [];
-  private _options: SnackOptions;
-  private _element: Element = document.createElement('div');
-  private _text: Element = document.createElement('div');
-  private _button: Element = document.createElement('button');
-  private _showing = false;
-  private _closeTimer?: number;
-  private _result: SnackShowResult = {
-    action: false,
-  };
+  // Provide a default 'dismiss' action
+  if (!timeout && actions.length === 0) actions.push('dismiss');

-  constructor (options: SnackOptions, callback?: (result: SnackShowResult) => void) {
-    this._options = options;
+  const el = document.createElement('div');
+  el.className = style.snackbar;
+  el.setAttribute('aria-live', 'assertive');
+  el.setAttribute('aria-atomic', 'true');
+  el.setAttribute('aria-hidden', 'false');

-    this._element.className = 'snackbar';
-    this._element.setAttribute('aria-live', 'assertive');
-    this._element.setAttribute('aria-atomic', 'true');
-    this._element.setAttribute('aria-hidden', 'true');
+  const text = document.createElement('div');
+  text.className = style.text;
+  text.textContent = message;
+  el.appendChild(text);

-    this._text.className = 'snackbar--text';
-    this._text.textContent = options.message;
-    this._element.appendChild(this._text);
+  const result = new Promise<string>((resolve) => {
+    let timeoutId: number;

-    if (options.actionText) {
-      this._button.className = 'snackbar--button';
-      this._button.textContent = options.actionText;
-      this._button.addEventListener('click', () => {
-        if (this._showing) {
-          if (options.actionHandler && options.actionHandler() === false) return;
-          this._result.action = true;
-        }
-        this.hide();
+    // Add action buttons
+    for (const action of actions) {
+      const button = document.createElement('button');
+      button.className = style.button;
+      button.textContent = action;
+      button.addEventListener('click', () => {
+        clearTimeout(timeoutId);
+        resolve(action);
      });
-      this._element.appendChild(this._button);
+      el.appendChild(button);
    }

-    if (callback) {
-      this._onremove.push(callback);
+    // Add timeout
+    if (timeout) {
+      timeoutId = self.setTimeout(
+        () => resolve(''),
+        timeout,
+      );
    }
-  }
+  });

-  cancelTimer () {
-    if (this._closeTimer != null) clearTimeout(this._closeTimer);
-  }
-
-  show (parent: Element): Promise<SnackShowResult> {
-    if (this._showing) return Promise.resolve(this._result);
-    this._showing = true;
-    this.cancelTimer();
-    if (parent !== this._element.parentNode) {
-      parent.appendChild(this._element);
-    }
-    this._element.removeAttribute('aria-hidden');
-    this._closeTimer = setTimeout(this.hide.bind(this), this._options.timeout || DEFAULT_TIMEOUT);
-    return new Promise((resolve) => {
-      this._onremove.push(resolve);
-    });
-  }
-
-  hide () {
-    if (!this._showing) return;
-    this._showing = false;
-    this.cancelTimer();
-    this._element.addEventListener('animationend', this.remove.bind(this));
-    this._element.setAttribute('aria-hidden', 'true');
-  }
-
-  remove () {
-    this.cancelTimer();
-    const parent = this._element.parentNode;
-    if (parent) parent.removeChild(this._element);
-    this._onremove.forEach(f => f(this._result));
-    this._onremove = [];
-  }
+  return [el, result];
 }

 export default class SnackBarElement extends HTMLElement {
-  private _snackbars: Snack[] = [];
-  private _processingStack = false;
+  private _snackbars: [string, SnackOptions, (action: Promise<string>) => void][] = [];
+  private _processingQueue = false;

-  showSnackbar (options: SnackOptions): Promise<SnackShowResult> {
-    return new Promise((resolve) => {
-      const snack = new Snack(options, resolve);
-      this._snackbars.push(snack);
-      this._processStack();
+  /**
+   * Show a snackbar. Returns a promise for the name of the action clicked, or an empty string if no
+   * action is clicked.
+   */
+  showSnackbar(message: string, options: SnackOptions = {}): Promise<string> {
+    return new Promise<string>((resolve) => {
+      this._snackbars.push([message, options, resolve]);
+      if (!this._processingQueue) this._processQueue();
    });
  }

-  private async _processStack () {
-    if (this._processingStack === true || this._snackbars.length === 0) return;
-    this._processingStack = true;
-    await this._snackbars[0].show(this);
-    this._snackbars.shift();
-    this._processingStack = false;
-    this._processStack();
+  private async _processQueue() {
+    this._processingQueue = true;
+
+    while (this._snackbars[0]) {
+      const [message, options, resolver] = this._snackbars[0];
+      const [el, result] = createSnack(message, options);
+      // Pass the result back to the original showSnackbar call.
+      resolver(result);
+      this.appendChild(el);
+
+      // Wait for the user to click an action, or for the snack to timeout.
+      await result;
+
+      // Transition the snack away.
+      el.setAttribute('aria-hidden', 'true');
+      await new Promise((resolve) => {
+        el.addEventListener('animationend', () => resolve());
+      });
+      el.remove();
+
+      this._snackbars.shift();
+    }
+
+    this._processingQueue = false;
  }
 }

--- a/src/lib/SnackBar/styles.css
+++ b/src/lib/SnackBar/styles.css
@@ -22,7 +22,6 @@ snack-bar {
  transform-origin: center;
  color: #eee;
  z-index: 100;
-  pointer-events: none;
  cursor: default;
  will-change: transform;
  animation: snackbar-show 300ms ease forwards 1;
@@ -53,13 +52,13 @@ snack-bar {
  }
 }

-.snackbar--text {
+.text {
  flex: 1 1 auto;
  padding: 16px;
  font-size: 100%;
 }

-.snackbar--button {
+.button {
  position: relative;
  flex: 0 1 auto;
  padding: 8px;
@@ -75,16 +74,15 @@ snack-bar {
  font-size: 100%;
  text-transform: uppercase;
  text-align: center;
-  pointer-events: all;
  cursor: pointer;
  overflow: hidden;
  transition: background-color 200ms ease;
  outline: none;
 }
-.snackbar--button:hover {
+.button:hover {
  background-color: rgba(0,0,0,0.15);
 }
-.snackbar--button:focus:before {
+.button:focus:before {
  content: '';
  position: absolute;
  left: 50%;
--- a/src/lib/icons.tsx
+++ b/src/lib/icons.tsx
@@ -2,32 +2,73 @@ import { h } from 'preact';

 // tslint:disable:max-line-length variable-name

-export interface IconProps extends JSX.HTMLAttributes {}
-
-const Icon = (props: IconProps) => (
+const Icon = (props: JSX.HTMLAttributes) => (
  <svg width="24" height="24" viewBox="0 0 24 24" fill="currentColor" {...props} />
 );

-export const DownloadIcon = (props: IconProps) => (
+export const DownloadIcon = (props: JSX.HTMLAttributes) => (
  <Icon {...props}>
-    <path d="M19.35 10.04A7.49 7.49 0 0 0 12 4C9.11 4 6.6 5.64 5.35 8.04A5.994 5.994 0 0 0 0 14c0 3.31 2.69 6 6 6h13c2.76 0 5-2.24 5-5 0-2.64-2.05-4.78-4.65-4.96zM17 13l-5 5-5-5h3V9h4v4h3z" />
+    <path d="M19 12v7H5v-7H3v7c0 1.1.9 2 2 2h14a2 2 0 0 0 2-2v-7h-2zm-6 .7l2.6-2.6 1.4 1.4-5 5-5-5 1.4-1.4 2.6 2.6V3h2z"/>
  </Icon>
 );

-export const ToggleIcon = (props: IconProps) => (
+export const ToggleIcon = (props: JSX.HTMLAttributes) => (
  <Icon {...props}>
    <path d="M3 13h2v-2H3v2zm0 4h2v-2H3v2zm2 4v-2H3c0 1.1.89 2 2 2zM3 9h2V7H3v2zm12 12h2v-2h-2v2zm4-18H9c-1.11 0-2 .9-2 2v10c0 1.1.89 2 2 2h10c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2zm0 12H9V5h10v10zm-8 6h2v-2h-2v2zm-4 0h2v-2H7v2z" />
  </Icon>
 );

-export const AddIcon = (props: IconProps) => (
+export const AddIcon = (props: JSX.HTMLAttributes) => (
  <Icon {...props}>
    <path d="M19 13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/>
  </Icon>
 );

-export const RemoveIcon = (props: IconProps) => (
+export const RemoveIcon = (props: JSX.HTMLAttributes) => (
  <Icon {...props}>
    <path d="M19 13H5v-2h14v2z"/>
  </Icon>
 );
+
+export const UncheckedIcon = (props: JSX.HTMLAttributes) => (
+  <Icon {...props}>
+    <path d="M21.3 2.7v18.6H2.7V2.7h18.6m0-2.7H2.7A2.7 2.7 0 0 0 0 2.7v18.6A2.7 2.7 0 0 0 2.7 24h18.6a2.7 2.7 0 0 0 2.7-2.7V2.7A2.7 2.7 0 0 0 21.3 0z"/>
+  </Icon>
+);
+
+export const CheckedIcon = (props: JSX.HTMLAttributes) => (
+  <Icon {...props}>
+    <path d="M21.3 0H2.7A2.7 2.7 0 0 0 0 2.7v18.6A2.7 2.7 0 0 0 2.7 24h18.6a2.7 2.7 0 0 0 2.7-2.7V2.7A2.7 2.7 0 0 0 21.3 0zm-12 18.7L2.7 12l1.8-1.9L9.3 15 19.5 4.8l1.8 1.9z"/>
+  </Icon>
+);
+
+export const ExpandIcon = (props: JSX.HTMLAttributes) => (
+  <Icon {...props}>
+    <path d="M16.6 8.6L12 13.2 7.4 8.6 6 10l6 6 6-6z"/>
+  </Icon>
+);
+
+const copyAcrossRotations = {
+  up: 90, right: 180, down: -90, left: 0,
+};
+
+export interface CopyAcrossIconProps extends JSX.HTMLAttributes {
+  copyDirection: keyof typeof copyAcrossRotations;
+}
+
+export const CopyAcrossIcon = (props: CopyAcrossIconProps) => {
+  const { copyDirection, ...otherProps } = props;
+  const id = 'point-' + copyDirection;
+  const rotation = copyAcrossRotations[copyDirection];
+
+  return (
+    <Icon {...otherProps}>
+      <defs>
+        <clipPath id={id}>
+          <path d="M-12-12v24h24v-24zM4.5 2h-4v3l-5-5 5-5v3h4z" transform={`translate(12 13) rotate(${rotation})`}/>
+        </clipPath>
+      </defs>
+      <path clip-path={`url(#${id})`} d="M19 3h-4.2c-.4-1.2-1.5-2-2.8-2s-2.4.8-2.8 2H5a2 2 0 0 0-2 2v14c0 1.1.9 2 2 2h14a2 2 0 0 0 2-2V5a2 2 0 0 0-2-2zm-7 0a1 1 0 0 1 0 2c-.6 0-1-.4-1-1s.4-1 1-1z"/>
+    </Icon>
+  );
+};
--- a/src/lib/util.scss
+++ b/src/lib/util.scss
@@ -5,6 +5,7 @@
  width: 100%;
  height: 100%;
  box-sizing: border-box;
+  contain: strict;
 }

 .unbutton {
--- a/src/lib/util.ts
+++ b/src/lib/util.ts
@@ -203,25 +203,40 @@ export function nativeResize(

 /**
 * @param field An HTMLInputElement, but the casting is done here to tidy up onChange.
+ * @param defaultVal Value to return if 'field' doesn't exist.
 */
-export function inputFieldValueAsNumber(field: any): number {
-  return Number((field as HTMLInputElement).value);
+export function inputFieldValueAsNumber(field: any, defaultVal: number = 0): number {
+  if (!field) return defaultVal;
+  return Number(inputFieldValue(field));
 }

 /**
 * @param field An HTMLInputElement, but the casting is done here to tidy up onChange.
+ * @param defaultVal Value to return if 'field' doesn't exist.
 */
-export function inputFieldCheckedAsNumber(field: any): number {
+export function inputFieldCheckedAsNumber(field: any, defaultVal: number = 0): number {
+  if (!field) return defaultVal;
  return Number(inputFieldChecked(field));
 }

 /**
 * @param field An HTMLInputElement, but the casting is done here to tidy up onChange.
+ * @param defaultVal Value to return if 'field' doesn't exist.
 */
-export function inputFieldChecked(field: any): boolean {
+export function inputFieldChecked(field: any, defaultVal: boolean = false): boolean {
+  if (!field) return defaultVal;
  return (field as HTMLInputElement).checked;
 }

+/**
+ * @param field An HTMLInputElement, but the casting is done here to tidy up onChange.
+ * @param defaultVal Value to return if 'field' doesn't exist.
+ */
+export function inputFieldValue(field: any, defaultVal: string = ''): string {
+  if (!field) return defaultVal;
+  return (field as HTMLInputElement).value;
+}
+
 /**
 * Creates a promise that resolves when the user types the konami code.
 */
@@ -243,3 +258,43 @@ export function konami(): Promise<void> {
    window.addEventListener('keydown', listener);
  });
 }
+
+interface TransitionOptions {
+  from?: number;
+  to?: number;
+  duration?: number;
+  easing?: string;
+}
+
+export async function transitionHeight(el: HTMLElement, opts: TransitionOptions): Promise<void> {
+  const {
+    from = el.getBoundingClientRect().height,
+    to = el.getBoundingClientRect().height,
+    duration = 1000,
+    easing = 'ease-in-out',
+  } = opts;
+
+  if (from === to || duration === 0) {
+    el.style.height = to + 'px';
+    return;
+  }
+
+  el.style.height = from + 'px';
+  // Force a style calc so the browser picks up the start value.
+  getComputedStyle(el).transform;
+  el.style.transition = `height ${duration}ms ${easing}`;
+  el.style.height = to + 'px';
+
+  return new Promise<void>((resolve) => {
+    const listener = (event: Event) => {
+      if (event.target !== el) return;
+      el.style.transition = '';
+      el.removeEventListener('transitionend', listener);
+      el.removeEventListener('transitioncancel', listener);
+      resolve();
+    };
+
+    el.addEventListener('transitionend', listener);
+    el.addEventListener('transitioncancel', listener);
+  });
+}
--- a/src/style/index.scss
+++ b/src/style/index.scss
@@ -1,7 +1,3 @@
-/*
-Note: These styles are temporary. They will be replaced before going live.
-*/
-
@import './reset.scss';

 html, body {
--- a/src/style/reset.scss
+++ b/src/style/reset.scss
@@ -1,7 +1,3 @@
-/*
-Note: These styles are temporary. They will be replaced before going live.
-*/
-
 button, a, img, input, select, textarea {
  -webkit-tap-highlight-color: rgba(0,0,0,0);
 }
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -23,7 +23,9 @@ module.exports = function (_, env) {
  const nodeModules = path.join(__dirname, 'node_modules');
  const componentStyleDirs = [
    path.join(__dirname, 'src/components'),
-    path.join(__dirname, 'src/codecs')
+    path.join(__dirname, 'src/codecs'),
+    path.join(__dirname, 'src/custom-els'),
+    path.join(__dirname, 'src/lib'),
  ];

  return {
@@ -106,7 +108,7 @@ module.exports = function (_, env) {
              loader: 'typings-for-css-modules-loader',
              options: {
                modules: true,
-                localIdentName: '[local]__[hash:base64:5]',
+                localIdentName: isProd ? '[hash:base64:5]' : '[local]__[hash:base64:5]',
                namedExport: true,
                camelCase: true,
                importLoaders: 1,
@@ -198,8 +200,11 @@ module.exports = function (_, env) {

      new OptimizeCssAssetsPlugin({
        cssProcessorOptions: {
-          zindex: false,
-          discardComments: { removeAll: true }
+          postcssReduceIdents: {
+            counterStyle: false,
+            gridTemplate: false,
+            keyframes: false
+          }
        }
      }),
Author	SHA1	Message	Date
Jake Archibald	008bae62da	Splitting PointerTracker into its own project	2018-11-06 14:18:53 +00:00
Jake Archibald	150e704d20	It's a dev package	2018-11-06 13:50:50 +00:00
Paul Kinlan	b2d47f0fb8	fixing a deps issue.	2018-11-06 13:50:49 +00:00
Paul Kinlan	bd3d33296d	Updating based on changes to filedrop element.	2018-11-06 13:50:49 +00:00
Paul Kinlan	f4c82ced97	#199 - Removes the file-drop custom element + Removes the custom element from the project + Replaces it with the externally maintined custom element	2018-11-06 13:50:48 +00:00
Jake Archibald	76188df0d3	Destructuring args.	2018-11-06 13:47:18 +00:00
Jake Archibald	9a58e4d339	Fixing lossless slider for webP. Previously you couldn't select "9" :D	2018-11-06 13:47:18 +00:00
Jake Archibald	f396a5b784	MozJPEG chroma subsampling and quality (#235 ) * Adding chroma subsampling for mozjpeg * Adding separate chroma quality. * Preact sometimes removes the inline styles, this fixes it. * Simplifying chroma subsample * Adding comments	2018-11-06 13:46:52 +00:00
Jake Archibald	e572b853e2	Snackbar defaults & copy undo (#233 ) * Fix snackbar defaults. Fixes #205. * Undo copy settings across. * Oops * Fixing stupid minification bug * Something weird happened with the last commit	2018-11-06 13:44:15 +00:00
Jake Archibald	726c2f195a	Fixing graphics glitch. Fixes #166 (#232 )	2018-11-06 13:41:08 +00:00
Jake Archibald	4599e51b1e	Copy to side ui (#229 ) * Copy settings to other side button * Download button on the outside. * Whoops	2018-11-06 13:39:03 +00:00
Jake Archibald	d93169cc5a	Mobile ui (#227 ) * Basic grid setup * Fixing thumb on two-up * Adding margin so you can still access the two-up * Allow multi-panel to keep one open only * Edge cases for one-open * Abstracting results so it can be used as a heading. * Ordering of items in mobile view. Changing scrolling element. * Adding labels to collapsed view * Adding height animation to multi-panel * Fixing animation bugs * Expand/collapse icon * Allow two-up and pinch-zoom to work beneath controls * Range bubble now behaves properly on mobile * No longer need this. * Prevent options overflow at larger widths	2018-11-06 13:37:52 +00:00
Jake Archibald	bdd3c11f1a	Options ui (#222 ) * wip * Commenting stuff to keep the build happy * Revealing sections * Custom select elements & more form work * Range input styles * Text fields with inputs do the right thing * Safari & Firefox fixes * Large compress select * oops * MozJPEG options updated * OptPNG options * These asserts weren't true * Generic options * WebP options * Hiding "edit" when "original image" * Download icon * Copy setting button - still not happy with this * Progress indicator * Loading icon enter/exit anim * Preventing controls going under options * Ahh so that's what was causing scrolling * Ahh so that's what was causing outlines * Simplifying range styles and fixing cross-browser * Processing custom element styles * Get precision from step by default * I don't know how or when this happened. * Don't need that many steps * Avoid having an element that covers the pinch zoom * Preventing overlap with zoom controls * Prevent ts warning * Fixing spinner position * Simplifying FileSize	2018-11-06 13:36:23 +00:00
Jake Archibald	0cec90c7ca	Main ui (#214 ) * Class for file drop * OCD * We don't need the invalid state, as we'll accept all types. * Flattening CSS * Fixing zoom input in Firefox * Fixing 'container' scaleTo * two-up closer design match & smaller line * Fixing edge bug	2018-11-06 13:31:58 +00:00