Fixing edge bug

codecs/mozjpeg_enc/README.md

@@ -39,9 +39,5 @@ 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;
 };
 ```

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: 75,
+      quality: 40,
       baseline: false,
       arithmetic: false,
       progressive: true,
@@ -29,14 +29,10 @@
       smoothing: 0,
       color_space: 3,
       quant_table: 3,
-      trellis_multipass: false,
+      trellis_multipass: true,
-      trellis_opt_zero: false,
+      trellis_opt_zero: true,
-      trellis_opt_table: false,
+      trellis_opt_table: true,
       trellis_loops: 1,
-      auto_subsample: true,
-      chroma_subsample: 2,
-      separate_chroma_quality: false,
-      chroma_quality: 75,
     });
 
     const blob = new Blob([result], {type: 'image/jpeg'});

codecs/mozjpeg_enc/mozjpeg_enc.cpp

@@ -29,10 +29,6 @@ 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() {
@@ -123,6 +119,9 @@ 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) {
@@ -143,23 +142,11 @@ 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 {
@@ -222,10 +209,6 @@ 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);

package-lock.json

@@ -59,9 +59,9 @@
       "dev": true
     },
     "@types/node": {
-      "version": "9.6.35",
+      "version": "9.6.31",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-9.6.35.tgz",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-9.6.31.tgz",
-      "integrity": "sha512-h5zvHS8wXHGa+Gcqs9K8vqCgOtqjr0+NqG/DDJmQIX1wpR9HivAfgV8bjcD3mGM4bPfQw5Aneb2Pn8355L83jA==",
+      "integrity": "sha512-kIVlvUBizL51ALNMPbmcZoM7quHyB7J6fLRwQe22JsMp39nrVSHdBeVVS3fnQCK1orxI3O8LScmb8cuiihkAfA==",
       "dev": true
     },
     "@types/pretty-bytes": {
@@ -254,9 +254,9 @@
       }
     },
     "@webcomponents/custom-elements": {
-      "version": "1.2.1",
+      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/@webcomponents/custom-elements/-/custom-elements-1.2.1.tgz",
+      "resolved": "https://registry.npmjs.org/@webcomponents/custom-elements/-/custom-elements-1.2.0.tgz",
-      "integrity": "sha512-flmTp4rVbBkcUIF3eBO3LNoAaYvleTdhPZKzdzr6iztWLLrxCctcK+7MAQeC3/SPjc3JDdC3jYLMRF4R6C3f9g==",
+      "integrity": "sha512-KegC4y9/xlZNlEcKNtMmKXxNNMMLROzVntX55NfSgMhaXjwNf8EG8ypA2lt20ZQ/LoL0QuGxMZnf3kO5DdQjEQ==",
       "dev": true
     },
     "@xtuc/ieee754": {
@@ -339,9 +339,9 @@
       "dev": true
     },
     "ansi-colors": {
-      "version": "3.1.0",
+      "version": "3.0.5",
-      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.0.5.tgz",
-      "integrity": "sha512-hTv1qPdi+sVEk3jYsdjox5nQI0C9HTbjKShbCdYLKb1LOfNbb7wsF4d7OEKIZoxIHx02tSp3m94jcPW2EfMjmA==",
+      "integrity": "sha512-VVjWpkfaphxUBFarydrQ3n26zX5nIK7hcbT3/ielrvwDDyBBjuh2vuSw1P9zkPq0cfqvdw7lkYHnu+OLSfIBsg==",
       "dev": true
     },
     "ansi-escapes": {
@@ -904,67 +904,67 @@
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     "babel-plugin-syntax-async-functions": {
       "version": "6.13.0",
-      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-async-functions/-/babel-plugin-syntax-async-functions-6.13.0.tgz",
+      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-async-functions/-/babel-plugin-syntax-async-functions-6.13.0.tgz",
       "integrity": "sha1-ytnK0RkbWtY0vzCuCHI5HgZHvpU=",
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-      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-async-generators/-/babel-plugin-syntax-async-generators-6.13.0.tgz",
+      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-async-generators/-/babel-plugin-syntax-async-generators-6.13.0.tgz",
       "integrity": "sha1-a8lj67FuzLrmuStZbrfzXDQqi5o=",
       "dev": true
     },
     "babel-plugin-syntax-class-constructor-call": {
       "version": "6.18.0",
-      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-class-constructor-call/-/babel-plugin-syntax-class-constructor-call-6.18.0.tgz",
+      "resolved": "http://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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-      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-class-properties/-/babel-plugin-syntax-class-properties-6.13.0.tgz",
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     "babel-plugin-syntax-dynamic-import": {
       "version": "6.18.0",
-      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-dynamic-import/-/babel-plugin-syntax-dynamic-import-6.18.0.tgz",
+      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-dynamic-import/-/babel-plugin-syntax-dynamic-import-6.18.0.tgz",
       "integrity": "sha1-jWomIpyDdFqZgqRBBRVyyqF5sdo=",
       "dev": true
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     "babel-plugin-syntax-exponentiation-operator": {
       "version": "6.13.0",
-      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-exponentiation-operator/-/babel-plugin-syntax-exponentiation-operator-6.13.0.tgz",
+      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-exponentiation-operator/-/babel-plugin-syntax-exponentiation-operator-6.13.0.tgz",
       "integrity": "sha1-nufoM3KQ2pUoggGmpX9BcDF4MN4=",
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       "version": "6.13.0",
-      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-export-extensions/-/babel-plugin-syntax-export-extensions-6.13.0.tgz",
+      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-export-extensions/-/babel-plugin-syntax-export-extensions-6.13.0.tgz",
       "integrity": "sha1-cKFITw+QiaToStRLrDU8lbmxJyE=",
       "dev": true
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       "version": "6.18.0",
-      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-flow/-/babel-plugin-syntax-flow-6.18.0.tgz",
+      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-flow/-/babel-plugin-syntax-flow-6.18.0.tgz",
       "integrity": "sha1-TDqyCiryaqIM0lmVw5jE63AxDI0=",
       "dev": true
     },
     "babel-plugin-syntax-jsx": {
       "version": "6.18.0",
-      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-jsx/-/babel-plugin-syntax-jsx-6.18.0.tgz",
+      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-jsx/-/babel-plugin-syntax-jsx-6.18.0.tgz",
       "integrity": "sha1-CvMqmm4Tyno/1QaeYtew9Y0NiUY=",
       "dev": true
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     "babel-plugin-syntax-object-rest-spread": {
       "version": "6.13.0",
-      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz",
+      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz",
       "integrity": "sha1-/WU28rzhODb/o6VFjEkDpZe7O/U=",
       "dev": true
     },
@@ -1339,9 +1339,9 @@
       }
     },
     "babel-plugin-transform-react-remove-prop-types": {
-      "version": "0.4.19",
+      "version": "0.4.15",
-      "resolved": "https://registry.npmjs.org/babel-plugin-transform-react-remove-prop-types/-/babel-plugin-transform-react-remove-prop-types-0.4.19.tgz",
+      "resolved": "https://registry.npmjs.org/babel-plugin-transform-react-remove-prop-types/-/babel-plugin-transform-react-remove-prop-types-0.4.15.tgz",
-      "integrity": "sha512-f49NsaohQ1ByY20nUrpc30QFdbeT4ntV4PAL2vSZe6uCB5nqAcqXS/qzU+aI6ZfYhWASx5eIsTFvFrs1B2ffGg==",
+      "integrity": "sha512-bFxxYdkZBwTjTgtZEPTLqu9g8Ajz8x8uEP/O1iVuaZIz2RuxJ2gtx0EXDJRonC++KGsgsW/4Hqvk4KViEtE2nw==",
       "dev": true
     },
     "babel-plugin-transform-regenerator": {
@@ -1639,6 +1639,7 @@
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       "integrity": "sha1-pDAdOJtqQ/m2f/PKEaP2Y342Dp4=",
       "dev": true,
+      "optional": true,
       "requires": {
         "tweetnacl": "^0.14.3"
       }
@@ -1794,7 +1795,7 @@
     },
     "browserify-aes": {
       "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/browserify-aes/-/browserify-aes-1.2.0.tgz",
+      "resolved": "http://registry.npmjs.org/browserify-aes/-/browserify-aes-1.2.0.tgz",
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@@ -1831,7 +1832,7 @@
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     "browserify-rsa": {
       "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.0.1.tgz",
+      "resolved": "http://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.0.1.tgz",
       "integrity": "sha1-IeCr+vbyApzy+vsTNWenAdQTVSQ=",
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@@ -1875,7 +1876,7 @@
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     "buffer": {
       "version": "4.9.1",
-      "resolved": "https://registry.npmjs.org/buffer/-/buffer-4.9.1.tgz",
+      "resolved": "http://registry.npmjs.org/buffer/-/buffer-4.9.1.tgz",
       "integrity": "sha1-bRu2AbB6TvztlwlBMgkwJ8lbwpg=",
       "dev": true,
       "requires": {
@@ -2603,9 +2604,9 @@
       "dev": true
     },
     "copy-webpack-plugin": {
-      "version": "4.5.3",
+      "version": "4.5.2",
-      "resolved": "https://registry.npmjs.org/copy-webpack-plugin/-/copy-webpack-plugin-4.5.3.tgz",
+      "resolved": "https://registry.npmjs.org/copy-webpack-plugin/-/copy-webpack-plugin-4.5.2.tgz",
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+      "integrity": "sha512-zmC33E8FFSq3AbflTvqvPvBo621H36Afsxlui91d+QyZxPIuXghfnTsa1CuqiAaCPgJoSUWfTFbKJnadZpKEbQ==",
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@@ -2671,7 +2672,7 @@
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     "create-hash": {
       "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/create-hash/-/create-hash-1.2.0.tgz",
+      "resolved": "http://registry.npmjs.org/create-hash/-/create-hash-1.2.0.tgz",
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@@ -2684,7 +2685,7 @@
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     "create-hmac": {
       "version": "1.1.7",
-      "resolved": "https://registry.npmjs.org/create-hmac/-/create-hmac-1.1.7.tgz",
+      "resolved": "http://registry.npmjs.org/create-hmac/-/create-hmac-1.1.7.tgz",
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@@ -3138,7 +3139,7 @@
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     "diffie-hellman": {
       "version": "5.0.3",
-      "resolved": "https://registry.npmjs.org/diffie-hellman/-/diffie-hellman-5.0.3.tgz",
+      "resolved": "http://registry.npmjs.org/diffie-hellman/-/diffie-hellman-5.0.3.tgz",
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       "dev": true,
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@@ -3208,7 +3209,7 @@
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     "dom-converter": {
       "version": "0.1.4",
-      "resolved": "https://registry.npmjs.org/dom-converter/-/dom-converter-0.1.4.tgz",
+      "resolved": "http://registry.npmjs.org/dom-converter/-/dom-converter-0.1.4.tgz",
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@@ -3274,7 +3275,7 @@
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     "duplexer": {
       "version": "0.1.1",
-      "resolved": "https://registry.npmjs.org/duplexer/-/duplexer-0.1.1.tgz",
+      "resolved": "http://registry.npmjs.org/duplexer/-/duplexer-0.1.1.tgz",
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       "dev": true
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@@ -3285,9 +3286,9 @@
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-      "version": "3.6.1",
+      "version": "3.6.0",
-      "resolved": "https://registry.npmjs.org/duplexify/-/duplexify-3.6.1.tgz",
+      "resolved": "https://registry.npmjs.org/duplexify/-/duplexify-3.6.0.tgz",
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       "integrity": "sha1-OoOpBOVDUyh4dMVkt1SThoSamMk=",
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+      "optional": true,
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@@ -3685,7 +3687,7 @@
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-      "resolved": "https://registry.npmjs.org/express/-/express-4.16.3.tgz",
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@@ -3764,7 +3766,7 @@
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     "external-editor": {
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-      "resolved": "https://registry.npmjs.org/external-editor/-/external-editor-2.2.0.tgz",
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@@ -3894,12 +3896,6 @@
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@@ -4018,9 +4014,9 @@
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@@ -4833,13 +4829,13 @@
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         "minimist": {
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-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.1.0.tgz",
+          "resolved": "http://registry.npmjs.org/minimist/-/minimist-0.1.0.tgz",
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@@ -5029,12 +5025,12 @@
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-      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.15.1.tgz",
+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.14.2.tgz",
-      "integrity": "sha512-mSdgNUaidk+dRU5MhYtN9zebdzF2iG0cNPWy8HG+W8y+fT1JnSkh0fzzpjOa0L7P8i1Rscz38t0h4gPcKz43xA==",
+      "integrity": "sha1-xvxhZIo9nE52T9P8306hBeSSupg=",
       "dev": true,
       "requires": {
         "asn1": "~0.2.3",
@@ -10347,7 +10330,7 @@
       "dependencies": {
         "rimraf": {
           "version": "2.2.8",
-          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.2.8.tgz",
+          "resolved": "http://registry.npmjs.org/rimraf/-/rimraf-2.2.8.tgz",
           "integrity": "sha1-5Dm+Kq7jJzIZUnMPmaiSnk/FBYI=",
           "dev": true
         }
@@ -10367,7 +10350,7 @@
     },
     "through": {
       "version": "2.3.8",
-      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "resolved": "http://registry.npmjs.org/through/-/through-2.3.8.tgz",
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
       "dev": true
     },
@@ -10472,12 +10455,11 @@
       "dev": true
     },
     "tough-cookie": {
-      "version": "2.4.3",
+      "version": "2.3.4",
-      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.4.3.tgz",
+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.3.4.tgz",
-      "integrity": "sha512-Q5srk/4vDM54WJsJio3XNn6K2sCG+CQ8G5Wz6bZhRZoAe/+TxjWB/GlFAnYEbkYVlON9FMk/fE3h2RLpPXo4lQ==",
+      "integrity": "sha512-TZ6TTfI5NtZnuyy/Kecv+CnoROnyXn2DN97LontgQpCwsX2XyLYCC0ENhYkehSOwAp8rTQKc/NUIF7BkQ5rKLA==",
       "dev": true,
       "requires": {
-        "psl": "^1.1.24",
         "punycode": "^1.4.1"
       },
       "dependencies": {
@@ -10774,7 +10756,8 @@
       "version": "0.14.5",
       "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
       "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "type-is": {
       "version": "1.6.16",
@@ -10941,18 +10924,18 @@
       "dev": true
     },
     "unique-filename": {
-      "version": "1.1.1",
+      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/unique-filename/-/unique-filename-1.1.1.tgz",
+      "resolved": "https://registry.npmjs.org/unique-filename/-/unique-filename-1.1.0.tgz",
-      "integrity": "sha512-Vmp0jIp2ln35UTXuryvjzkjGdRyf9b2lTXuSYUiPmzRcl3FDtYqAwOnTJkAngD9SWhnoJzDbTKwaOrZ+STtxNQ==",
+      "integrity": "sha1-0F8v5AMlYIcfMOk8vnNe6iAVFPM=",
       "dev": true,
       "requires": {
         "unique-slug": "^2.0.0"
       }
     },
     "unique-slug": {
-      "version": "2.0.1",
+      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/unique-slug/-/unique-slug-2.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/unique-slug/-/unique-slug-2.0.0.tgz",
-      "integrity": "sha512-n9cU6+gITaVu7VGj1Z8feKMmfAjEAQGhwD9fE3zvpRRa0wEIx8ODYkVGfSc94M2OX00tUFV8wH3zYbm1I8mxFg==",
+      "integrity": "sha1-22Z258fMBimHj/GWCXx4hVrp9Ks=",
       "dev": true,
       "requires": {
         "imurmurhash": "^0.1.4"
@@ -11055,6 +11038,12 @@
         }
       }
     },
+    "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",
@@ -11700,14 +11689,17 @@
       }
     },
     "webpack-dev-middleware": {
-      "version": "3.4.0",
+      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/webpack-dev-middleware/-/webpack-dev-middleware-3.4.0.tgz",
+      "resolved": "https://registry.npmjs.org/webpack-dev-middleware/-/webpack-dev-middleware-3.2.0.tgz",
-      "integrity": "sha512-Q9Iyc0X9dP9bAsYskAVJ/hmIZZQwf/3Sy4xCAZgL5cUkjZmUZLt4l5HpbST/Pdgjn3u6pE7u5OdGd1apgzRujA==",
+      "integrity": "sha512-YJLMF/96TpKXaEQwaLEo+Z4NDK8aV133ROF6xp9pe3gQoS7sxfpXh4Rv9eC+8vCvWfmDjRQaMSlRPbO+9G6jgA==",
       "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": {
@@ -11720,9 +11712,9 @@
       }
     },
     "webpack-dev-server": {
-      "version": "3.1.9",
+      "version": "3.1.8",
-      "resolved": "https://registry.npmjs.org/webpack-dev-server/-/webpack-dev-server-3.1.9.tgz",
+      "resolved": "https://registry.npmjs.org/webpack-dev-server/-/webpack-dev-server-3.1.8.tgz",
-      "integrity": "sha512-fqPkuNalLuc/hRC2QMkVYJkgNmRvxZQo7ykA2e1XRg/tMJm3qY7ZaD6d89/Fqjxtj9bOrn5wZzLD2n84lJdvWg==",
+      "integrity": "sha512-c+tcJtDqnPdxCAzEEZKdIPmg3i5i7cAHe+B+0xFNK0BlCc2HF/unYccbU7xTgfGc5xxhCztCQzFmsqim+KhI+A==",
       "dev": true,
       "requires": {
         "ansi-html": "0.0.7",
@@ -11750,7 +11742,7 @@
         "spdy": "^3.4.1",
         "strip-ansi": "^3.0.0",
         "supports-color": "^5.1.0",
-        "webpack-dev-middleware": "3.4.0",
+        "webpack-dev-middleware": "3.2.0",
         "webpack-log": "^2.0.0",
         "yargs": "12.0.2"
       },
@@ -11803,9 +11795,9 @@
           }
         },
         "debug": {
-          "version": "3.2.6",
+          "version": "3.2.5",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.5.tgz",
-          "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
+          "integrity": "sha512-D61LaDQPQkxJ5AUM2mbSJRbPkNs/TmdmOeLAi1hgDkpDfIfetSrjmWhccwtuResSwMbACjx/xXQofvM9CE/aeg==",
           "dev": true,
           "requires": {
             "ms": "^2.1.1"
@@ -12130,7 +12122,7 @@
     },
     "wrap-ansi": {
       "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
       "dev": true,
       "requires": {
@@ -12526,7 +12518,7 @@
         },
         "minimist": {
           "version": "1.2.0",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+          "resolved": "http://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
           "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
           "dev": true
         },

package.json

@@ -15,10 +15,10 @@
     }
   },
   "devDependencies": {
-    "@types/node": "^9.6.35",
+    "@types/node": "^9.6.23",
     "@types/pretty-bytes": "^5.1.0",
     "@types/webassembly-js-api": "0.0.1",
-    "@webcomponents/custom-elements": "^1.2.1",
+    "@webcomponents/custom-elements": "^1.2.0",
     "babel-loader": "^7.1.5",
     "babel-plugin-jsx-pragmatic": "^1.0.2",
     "babel-plugin-syntax-dynamic-import": "^6.18.0",
@@ -27,28 +27,21 @@
     "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": "^0.4.19",
+    "babel-plugin-transform-react-remove-prop-types": "^0.4.14",
     "babel-preset-env": "^1.7.0",
     "babel-register": "^6.26.0",
-    "classnames": "^2.2.6",
     "clean-webpack-plugin": "^0.1.19",
-    "comlink": "^3.0.3",
+    "copy-webpack-plugin": "^4.5.2",
-    "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": "^1.1.2",
+    "husky": "^1.0.0-rc.13",
     "if-env": "^1.0.4",
-    "linkstate": "^1.1.1",
     "loader-utils": "^1.1.0",
     "mini-css-extract-plugin": "^0.3.0",
-    "node-sass": "^4.9.4",
+    "node-sass": "^4.9.3",
     "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",
@@ -62,11 +55,16 @@
     "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"
   }
 }

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: 0.75 };
+export const defaultOptions: EncodeOptions = { quality: 0.5 };

src/codecs/browser-jpeg/options.ts

@@ -1,3 +1,3 @@
 import qualityOption from '../generic/quality-option';
 
-export default qualityOption({ min: 0, max: 1, step: 0.01 });
+export default qualityOption({ min: 0, max: 1, step: 0 });

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: 0.75 };
+export const defaultOptions: EncodeOptions = { quality: 0.5 };
 export const featureTest = () => canvasEncodeTest(mimeType);

src/codecs/browser-webp/options.ts

@@ -1,3 +1,3 @@
 import qualityOption from '../generic/quality-option';
 
-export default qualityOption({ min: 0, max: 1, step: 0.01 });
+export default qualityOption({ min: 0, max: 1, step: 0 });

src/codecs/generic/quality-option.tsx

@@ -1,7 +1,6 @@
 import { h, Component } from 'preact';
 import { bind } from '../../lib/initial-util';
-import * as style from '../../components/Options/style.scss';
+import '../../custom-els/RangeInput';
-import Range from '../../components/range';
 
 interface EncodeOptions {
   quality: number;
@@ -34,19 +33,18 @@ export default function qualityOption(opts: QualityOptionArg = {}) {
 
     render({ options }: Props) {
       return (
-        <div class={style.optionsSection}>
+        <div>
-          <div class={style.optionOneCell}>
+          <label>
-            <Range
+            Quality:
+            <range-input
               name="quality"
               min={min}
               max={max}
               step={step || 'any'}
-              value={options.quality}
+              value={'' + options.quality}
-              onInput={this.onChange}
+              onChange={this.onChange}
-            >
+            />
-              Quality:
+          </label>
-            </Range>
-          </div>
         </div>
       );
     }

src/codecs/imagequant/options.tsx

@@ -2,10 +2,6 @@ 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();
 
@@ -30,61 +26,50 @@ 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 newOptions: QuantizeOptions = {
+    const options: QuantizeOptions = {
-      zx: inputFieldValueAsNumber(form.zx, options.zx),
+      zx: inputFieldValueAsNumber(form.zx),
-      maxNumColors: inputFieldValueAsNumber(form.maxNumColors, options.maxNumColors),
+      maxNumColors: inputFieldValueAsNumber(form.maxNumColors),
       dither: inputFieldValueAsNumber(form.dither),
     };
-    this.props.onChange(newOptions);
+    this.props.onChange(options);
   }
 
   render({ options }: Props, { extendedSettings }: State) {
     return (
-      <form class={style.optionsSection}>
+      <form>
-        <Expander>
+        <label style={{ display: extendedSettings ? '' : 'none' }}>
-          {extendedSettings ?
+          Type:
-            <label class={style.optionTextFirst}>
+          <select
-              Type:
+            name="zx"
-              <Select
+            value={'' + options.zx}
-                name="zx"
+            onChange={this.onChange}
-                value={'' + options.zx}
+          >
-                onChange={this.onChange}
+            <option value="0">Standard</option>
-              >
+            <option value="1">ZX</option>
-                <option value="0">Standard</option>
+          </select>
-                <option value="1">ZX</option>
+        </label>
-              </Select>
+        <label style={{ display: options.zx ? 'none' : '' }}>
-            </label>
+          Palette Colors:
-          : null}
+          <range-input
-        </Expander>
+            name="maxNumColors"
-        <Expander>
+            min="2"
-          {options.zx ? null :
+            max="256"
-            <div class={style.optionOneCell}>
+            value={'' + options.maxNumColors}
-              <Range
+            onChange={this.onChange}
-                name="maxNumColors"
+          />
-                min="2"
+        </label>
-                max="256"
+        <label>
-                value={options.maxNumColors}
+          Dithering:
-                onInput={this.onChange}
+          <range-input
-              >
-                Colors:
-              </Range>
-            </div>
-          }
-        </Expander>
-        <div class={style.optionOneCell}>
-          <Range
             name="dither"
             min="0"
             max="1"
             step="0.01"
-            value={options.dither}
+            value={'' + options.dither}
-            onInput={this.onChange}
+            onChange={this.onChange}
-          >
+          />
-            Dithering:
+        </label>
-          </Range>
-        </div>
       </form>
     );
   }

src/codecs/mozjpeg/encoder-meta.ts

@@ -17,10 +17,6 @@ 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; }
@@ -42,8 +38,4 @@ 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,
 };

src/codecs/mozjpeg/options.tsx

@@ -2,256 +2,158 @@ import { h, Component } from 'preact';
 import { bind } from '../../lib/initial-util';
 import { inputFieldChecked, inputFieldValueAsNumber } from '../../lib/util';
 import { EncodeOptions, MozJpegColorSpace } from './encoder-meta';
-import * as style from '../../components/Options/style.scss';
+import '../../custom-els/RangeInput';
-import Checkbox from '../../components/checkbox';
-import Expander from '../../components/expander';
-import Select from '../../components/select';
-import Range from '../../components/range';
-import linkState from 'linkstate';
 
-interface Props {
+type Props = {
-  options: EncodeOptions;
+  options: EncodeOptions,
-  onChange(newOptions: EncodeOptions): void;
+  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 newOptions: EncodeOptions = {
+    const options: 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, options.baseline),
+      baseline: inputFieldChecked(form.baseline),
-      progressive: inputFieldChecked(form.progressive, options.progressive),
+      progressive: inputFieldChecked(form.progressive),
-      optimize_coding: inputFieldChecked(form.optimize_coding, options.optimize_coding),
+      optimize_coding: inputFieldChecked(form.optimize_coding),
-      trellis_multipass: inputFieldChecked(form.trellis_multipass, options.trellis_multipass),
+      trellis_multipass: inputFieldChecked(form.trellis_multipass),
-      trellis_opt_zero: inputFieldChecked(form.trellis_opt_zero, options.trellis_opt_zero),
+      trellis_opt_zero: inputFieldChecked(form.trellis_opt_zero),
-      trellis_opt_table: inputFieldChecked(form.trellis_opt_table, options.trellis_opt_table),
+      trellis_opt_table: inputFieldChecked(form.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, options.quality),
+      quality: inputFieldValueAsNumber(form.quality),
-      chroma_quality: inputFieldValueAsNumber(form.chroma_quality, options.chroma_quality),
+      smoothing: inputFieldValueAsNumber(form.smoothing),
-      chroma_subsample: inputFieldValueAsNumber(form.chroma_subsample, options.chroma_subsample),
+      color_space: inputFieldValueAsNumber(form.color_space),
-      smoothing: inputFieldValueAsNumber(form.smoothing, options.smoothing),
+      quant_table: inputFieldValueAsNumber(form.quant_table),
-      color_space: inputFieldValueAsNumber(form.color_space, options.color_space),
+      trellis_loops: inputFieldValueAsNumber(form.trellis_loops),
-      quant_table: inputFieldValueAsNumber(form.quant_table, options.quant_table),
-      trellis_loops: inputFieldValueAsNumber(form.trellis_loops, options.trellis_loops),
     };
-    this.props.onChange(newOptions);
+    this.props.onChange(options);
   }
 
-  render({ options }: Props, { showAdvanced }: State) {
+  render({ options }: Props) {
     // I'm rendering both lossy and lossless forms, as it becomes much easier when
     // gathering the data.
     return (
-      <form class={style.optionsSection}>
+      <form>
-        <div class={style.optionOneCell}>
+        <label>
-          <Range
+          Quality:
+          <range-input
             name="quality"
             min="0"
             max="100"
-            value={options.quality}
+            value={'' + options.quality}
-            onInput={this.onChange}
+            onChange={this.onChange}
-          >
+          />
-            Quality:
+        </label>
-          </Range>
+        <label>
-        </div>
+          <input
-        <label class={style.optionInputFirst}>
+            name="baseline"
-          <Checkbox
+            type="checkbox"
-            checked={showAdvanced}
+            checked={options.baseline}
-            onChange={linkState(this, 'showAdvanced')}
+            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}
+          >
+            <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}
           />
-          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>
     );
   }

src/codecs/optipng/options.tsx

@@ -2,8 +2,6 @@ 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;
@@ -23,19 +21,19 @@ export default class OptiPNGEncoderOptions extends Component<Props, {}> {
 
   render({ options }: Props) {
     return (
-      <form class={style.optionsSection}>
+      <form>
-        <div class={style.optionOneCell}>
+        <label>
-          <Range
+          Effort:
+          <input
             name="level"
+            type="range"
             min="0"
             max="7"
             step="1"
-            value={options.level}
+            value={'' + options.level}
-            onInput={this.onChange}
+            onChange={this.onChange}
-          >
+          />
-            Effort:
+        </label>
-          </Range>
-        </div>
       </form>
     );
   }

src/codecs/processor.ts

@@ -92,6 +92,7 @@ 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;
@@ -103,14 +104,14 @@ export default class Processor {
   /** Abort the current job, if any */
   abortCurrent() {
     if (!this._busy) return;
-    if (!this._abortRejector) throw Error("There must be a rejector if it's busy");
+    if (!this._worker || !this._abortRejector) {
+      throw Error("There must be a worker/rejector if it's busy");
+    }
     this._abortRejector(new DOMException('Aborted', 'AbortError'));
-    this._abortRejector = undefined;
-    this._busy = false;
-
-    if (!this._worker) return;
     this._worker.terminate();
     this._worker = undefined;
+    this._abortRejector = undefined;
+    this._busy = false;
   }
 
   // Off main thread jobs:

src/codecs/resize/options.tsx

@@ -1,12 +1,8 @@
 import { h, Component } from 'preact';
 import linkState from 'linkstate';
-import { bind, linkRef } from '../../lib/initial-util';
+import { bind } from '../../lib/initial-util';
-import { inputFieldValueAsNumber, inputFieldValue } from '../../lib/util';
+import { inputFieldValueAsNumber } 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;
@@ -26,26 +22,23 @@ export default class ResizerOptions extends Component<Props, State> {
 
   form?: HTMLFormElement;
 
-  private reportOptions() {
+  reportOptions() {
-    const form = this.form!;
+    const width = this.form!.width as HTMLInputElement;
-    const width = form.width as HTMLInputElement;
+    const height = this.form!.height as HTMLInputElement;
-    const height = form.height as HTMLInputElement;
-    const { options } = this.props;
 
     if (!width.checkValidity() || !height.checkValidity()) return;
 
-    const newOptions: ResizeOptions = {
+    const options: ResizeOptions = {
       width: inputFieldValueAsNumber(width),
       height: inputFieldValueAsNumber(height),
-      method: form.resizeMethod.value,
+      method: this.form!.resizeMethod.value,
-      // Casting, as the formfield only returns the correct values.
+      fitMethod: this.form!.fitMethod.value,
-      fitMethod: inputFieldValue(form.fitMethod, options.fitMethod) as ResizeOptions['fitMethod'],
     };
-    this.props.onChange(newOptions);
+    this.props.onChange(options);
   }
 
   @bind
-  private onChange() {
+  onChange(event: Event) {
     this.reportOptions();
   }
 
@@ -57,31 +50,27 @@ export default class ResizerOptions extends Component<Props, State> {
   }
 
   @bind
-  private onWidthInput() {
+  onWidthInput(event: Event) {
-    if (this.state.maintainAspect) {
+    if (!this.state.maintainAspect) return;
-      const width = inputFieldValueAsNumber(this.form!.width);
-      this.form!.height.value = Math.round(width / this.props.aspect);
-    }
 
-    this.reportOptions();
+    const width = inputFieldValueAsNumber(this.form!.width);
+    this.form!.height.value = Math.round(width / this.props.aspect);
   }
 
   @bind
-  private onHeightInput() {
+  onHeightInput(event: Event) {
-    if (this.state.maintainAspect) {
+    if (!this.state.maintainAspect) return;
-      const height = inputFieldValueAsNumber(this.form!.height);
-      this.form!.width.value = Math.round(height * this.props.aspect);
-    }
 
-    this.reportOptions();
+    const height = inputFieldValueAsNumber(this.form!.height);
+    this.form!.width.value = Math.round(height * this.props.aspect);
   }
 
-  render({ options, isVector }: Props, { maintainAspect }: State) {
+  render({ options, aspect, isVector }: Props, { maintainAspect }: State) {
     return (
-      <form ref={linkRef(this, 'form')} class={style.optionsSection}>
+      <form ref={el => this.form = el}>
-        <label class={style.optionTextFirst}>
+        <label>
           Method:
-          <Select
+          <select
             name="resizeMethod"
             value={options.method}
             onChange={this.onChange}
@@ -91,55 +80,51 @@ 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 class={style.optionTextFirst}>
+        <label>
           Width:
           <input
             required
-            class={style.textField}
             name="width"
             type="number"
             min="1"
             value={'' + options.width}
+            onChange={this.onChange}
             onInput={this.onWidthInput}
           />
         </label>
-        <label class={style.optionTextFirst}>
+        <label>
           Height:
           <input
             required
-            class={style.textField}
             name="height"
             type="number"
             min="1"
             value={'' + options.height}
-            onInput={this.onHeightInput}
+            onChange={this.onChange}
           />
         </label>
-        <label class={style.optionInputFirst}>
+        <label>
-          <Checkbox
+          <input
             name="maintainAspect"
+            type="checkbox"
             checked={maintainAspect}
             onChange={linkState(this, 'maintainAspect')}
           />
           Maintain aspect ratio
         </label>
-        <Expander>
+        <label style={{ display: maintainAspect ? 'none' : '' }}>
-          {maintainAspect ? null :
+          Fit method:
-            <label class={style.optionTextFirst}>
+          <select
-              Fit method:
+            name="fitMethod"
-              <Select
+            value={options.fitMethod}
-                name="fitMethod"
+            onChange={this.onChange}
-                value={options.fitMethod}
+          >
-                onChange={this.onChange}
+            <option value="stretch">Stretch</option>
-              >
+            <option value="cover">Cover</option>
-                <option value="stretch">Stretch</option>
+          </select>
-                <option value="cover">Cover</option>
+        </label>
-              </Select>
-            </label>
-          }
-        </Expander>
       </form>
     );
   }

src/codecs/webp/options.tsx

@@ -2,21 +2,13 @@ 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 style from '../../components/Options/style.scss';
+import * as styles from './styles.scss';
-import Checkbox from '../../components/checkbox';
+import '../../custom-els/RangeInput';
-import Expander from '../../components/expander';
-import Select from '../../components/select';
-import Range from '../../components/range';
-import linkState from 'linkstate';
 
-interface Props {
+type Props = {
-  options: EncodeOptions;
+  options: EncodeOptions,
-  onChange(newOptions: EncodeOptions): void;
+  onChange(newOptions: EncodeOptions): void,
-}
+};
-
-interface State {
-  showAdvanced: boolean;
-}
 
 // From kLosslessPresets in config_enc.c
 // The format is [method, quality].
@@ -26,291 +18,257 @@ const losslessPresets:[number, number][] = [
 ];
 const losslessPresetDefault = 6;
 
-function determineLosslessQuality(quality: number, method: number): number {
+function determineLosslessQuality(quality: number): number {
-  const index = losslessPresets.findIndex(
+  const index = losslessPresets.findIndex(item => item[1] === quality);
-    ([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, State> {
+export default class WebPEncoderOptions extends Component<Props, {}> {
-  state: State = {
-    showAdvanced: false,
-  };
-
   @bind
   onChange(event: Event) {
     const form = (event.currentTarget as HTMLInputElement).closest('form') as HTMLFormElement;
     const lossless = inputFieldCheckedAsNumber(form.lossless);
-    const { options } = this.props;
+    const losslessPresetInput = (form.lossless_preset as HTMLInputElement);
-    const losslessPresetValue = inputFieldValueAsNumber(
-      form.lossless_preset, determineLosslessQuality(options.quality, options.method),
-    );
 
-    const newOptions: EncodeOptions = {
+    const options: EncodeOptions = {
       // Copy over options the form doesn't care about, eg emulate_jpeg_size
-      ...options,
+      ...this.props.options,
       // And now stuff from the form:
       lossless,
       // Special-cased inputs:
       // In lossless mode, the quality is derived from the preset.
       quality: lossless ?
-        losslessPresets[losslessPresetValue][1] :
+        losslessPresets[Number(losslessPresetInput.value)][1] :
-        inputFieldValueAsNumber(form.quality, options.quality),
+        inputFieldValueAsNumber(form.quality),
       // In lossless mode, the method is derived from the preset.
       method: lossless ?
-        losslessPresets[losslessPresetValue][0] :
+        losslessPresets[Number(losslessPresetInput.value)][0] :
-        inputFieldValueAsNumber(form.method_input, options.method),
+        inputFieldValueAsNumber(form.method_input),
-      image_hint: inputFieldCheckedAsNumber(form.image_hint, options.image_hint) ?
+      image_hint: (form.image_hint as HTMLInputElement).checked ?
         WebPImageHint.WEBP_HINT_GRAPH :
         WebPImageHint.WEBP_HINT_DEFAULT,
       // .checked
-      exact: inputFieldCheckedAsNumber(form.exact, options.exact),
+      exact: inputFieldCheckedAsNumber(form.exact),
-      alpha_compression: inputFieldCheckedAsNumber(
+      alpha_compression: inputFieldCheckedAsNumber(form.alpha_compression),
-        form.alpha_compression, options.alpha_compression,
+      autofilter: inputFieldCheckedAsNumber(form.autofilter),
-      ),
+      filter_type: inputFieldCheckedAsNumber(form.filter_type),
-      autofilter: inputFieldCheckedAsNumber(form.autofilter, options.autofilter),
+      use_sharp_yuv: inputFieldCheckedAsNumber(form.use_sharp_yuv),
-      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, 100 - options.near_lossless),
+      near_lossless: 100 - inputFieldValueAsNumber(form.near_lossless),
-      alpha_quality: inputFieldValueAsNumber(form.alpha_quality, options.alpha_quality),
+      alpha_quality: inputFieldValueAsNumber(form.alpha_quality),
-      alpha_filtering: inputFieldValueAsNumber(form.alpha_filtering, options.alpha_filtering),
+      alpha_filtering: inputFieldValueAsNumber(form.alpha_filtering),
-      sns_strength: inputFieldValueAsNumber(form.sns_strength, options.sns_strength),
+      sns_strength: inputFieldValueAsNumber(form.sns_strength),
-      filter_strength: inputFieldValueAsNumber(form.filter_strength, options.filter_strength),
+      filter_strength: inputFieldValueAsNumber(form.filter_strength),
-      filter_sharpness:
+      filter_sharpness: 7 - inputFieldValueAsNumber(form.filter_sharpness),
-        7 - inputFieldValueAsNumber(form.filter_sharpness, 7 - options.filter_sharpness),
+      pass: inputFieldValueAsNumber(form.pass),
-      pass: inputFieldValueAsNumber(form.pass, options.pass),
+      preprocessing: inputFieldValueAsNumber(form.preprocessing),
-      preprocessing: inputFieldValueAsNumber(form.preprocessing, options.preprocessing),
+      segments: inputFieldValueAsNumber(form.segments),
-      segments: inputFieldValueAsNumber(form.segments, options.segments),
+      partitions: inputFieldValueAsNumber(form.partitions),
-      partitions: inputFieldValueAsNumber(form.partitions, options.partitions),
     };
-    this.props.onChange(newOptions);
+    this.props.onChange(options);
   }
 
   private _losslessSpecificOptions(options: EncodeOptions) {
     return (
-      <div key="lossless">
+      <div>
-        <div class={style.optionOneCell}>
+        <label>
-          <Range
+          Effort:
+          <range-input
             name="lossless_preset"
             min="0"
             max="9"
-            value={determineLosslessQuality(options.quality, options.method)}
+            value={'' + determineLosslessQuality(options.quality)}
-            onInput={this.onChange}
+            onChange={this.onChange}
-          >
+          />
-            Effort:
+        </label>
-          </Range>
+        <label>
-        </div>
+          Slight loss:
-        <div class={style.optionOneCell}>
+          <range-input
-          <Range
             name="near_lossless"
             min="0"
             max="100"
             value={'' + (100 - options.near_lossless)}
-            onInput={this.onChange}
+            onChange={this.onChange}
-          >
+          />
-            Slight loss:
+        </label>
-          </Range>
+        <label>
-        </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.
           */}
-          <Checkbox
+          <input
             name="image_hint"
+            type="checkbox"
             checked={options.image_hint === WebPImageHint.WEBP_HINT_GRAPH}
+            value={'' + WebPImageHint.WEBP_HINT_GRAPH}
             onChange={this.onChange}
           />
-          Discrete tone image
+          <span>Discrete tone image (graph, map-tile etc)</span>
         </label>
       </div>
     );
   }
 
   private _lossySpecificOptions(options: EncodeOptions) {
-    const { showAdvanced } = this.state;
-
     return (
-      <div key="lossy">
+      <div>
-        <div class={style.optionOneCell}>
+        <label>
-          <Range
+          Effort:
+          <range-input
             name="method_input"
             min="0"
             max="6"
-            value={options.method}
+            value={'' + options.method}
-            onInput={this.onChange}
+            onChange={this.onChange}
-          >
+          />
-            Effort:
+        </label>
-          </Range>
+        <label>
-        </div>
+          Quality:
-        <div class={style.optionOneCell}>
+          <range-input
-          <Range
             name="quality"
             min="0"
             max="100"
-            step="0.1"
+            step="0.01"
-            value={options.quality}
+            value={'' + options.quality}
-            onInput={this.onChange}
+            onChange={this.onChange}
-          >
+          />
-            Quality:
+        </label>
-          </Range>
+        <hr />
-        </div>
+        <label>
-        <label class={style.optionInputFirst}>
+          <input
-          <Checkbox
+            name="alpha_compression"
-            checked={showAdvanced}
+            type="checkbox"
-            onChange={linkState(this, 'showAdvanced')}
+            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}
+          >
+            <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}
           />
-          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>
     );
   }
@@ -319,26 +277,32 @@ export default class WebPEncoderOptions extends Component<Props, State> {
     // I'm rendering both lossy and lossless forms, as it becomes much easier when
     // gathering the data.
     return (
-      <form class={style.optionsSection}>
+      <form>
-        <label class={style.optionInputFirst}>
+        <label>
-          <Checkbox
+          <input
             name="lossless"
+            type="checkbox"
             checked={!!options.lossless}
             onChange={this.onChange}
           />
           Lossless
         </label>
-        {options.lossless
+        <div class={options.lossless ? '' : styles.hide}>
-          ? this._losslessSpecificOptions(options)
+          {this._losslessSpecificOptions(options)}
-          : this._lossySpecificOptions(options)
+        </div>
-        }
+        <div class={options.lossless ? styles.hide : ''}>
-        <label class={style.optionInputFirst}>
+          {this._lossySpecificOptions(options)}
-          <Checkbox
+        </div>
+        <label>
+          <input
             name="exact"
+            type="checkbox"
             checked={!!options.exact}
             onChange={this.onChange}
           />
-          Preserve transparent data
+          <span>
+            Preserve transparent data. Otherwise, pixels with zero alpha will have RGB also zeroed.
+          </span>
         </label>
       </form>
     );

src/codecs/webp/styles.scss

@@ -0,0 +1,3 @@
+.hide {
+  display: none;
+}

src/components/App/custom-els/FileDrop/index.ts

@@ -0,0 +1,153 @@
+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);

src/components/App/custom-els/FileDrop/missing-types.d.ts

@@ -0,0 +1,19 @@
+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;
+    }
+  }
+}

src/components/App/custom-els/FileDrop/styles.css

@@ -0,0 +1,3 @@
+file-drop {
+  display: block;
+}

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 'file-drop-element';
+import { FileDropEvent } from './custom-els/FileDrop';
-import 'file-drop-element';
+import './custom-els/FileDrop';
-import SnackBarElement, { SnackOptions } from '../../lib/SnackBar';
+import SnackBarElement 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.showSnack('Failed to load app');
+      this.showError('Failed to load app');
     });
 
     // In development, persist application state across hot reloads:
@@ -66,9 +66,9 @@ export default class App extends Component<Props, State> {
   }
 
   @bind
-  private showSnack(message: string, options: SnackOptions = {}): Promise<string> {
+  private showError(error: string) {
     if (!this.snackbar) throw Error('Snackbar missing');
-    return this.snackbar.showSnackbar(message, options);
+    this.snackbar.showSnackbar({ message: error });
   }
 
   render({}: Props, { file, Compress }: State) {
@@ -76,9 +76,9 @@ export default class App extends Component<Props, State> {
       <div id="app" class={style.app}>
         <file-drop accept="image/*" onfiledrop={this.onFileDrop} class={style.drop}>
           {(!file)
-            ? <Intro onFile={this.onIntroPickFile} showSnack={this.showSnack} />
+            ? <Intro onFile={this.onIntroPickFile} onError={this.showError} />
             : (Compress)
-              ? <Compress file={file} showSnack={this.showSnack} />
+              ? <Compress file={file} onError={this.showError} />
               : <loading-spinner class={style.appLoader}/>
           }
           <snack-bar ref={linkRef(this, 'snackbar')} />

src/components/App/style.scss

@@ -1,3 +1,7 @@
+/*
+Note: These styles are temporary. They will be replaced before going live.
+*/
+
 .app {
   position: absolute;
   left: 0;

src/components/FileSize.tsx

@@ -0,0 +1,87 @@
+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>
+    );
+  }
+}

src/components/Options/index.tsx

@@ -1,7 +1,7 @@
 import { h, Component } from 'preact';
 
 import * as style from './style.scss';
-import { bind } from '../../lib/initial-util';
+import { bind, Fileish } 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,
@@ -56,14 +56,23 @@ const encoderOptionsComponentMap = {
   [browserPDF.type]: undefined,
 };
 
+const titles = {
+  horizontal: ['Left Image', 'Right Image'],
+  vertical: ['Top Image', 'Bottom Image'],
+};
+
 interface Props {
-  mobileView: boolean;
+  orientation: 'horizontal' | 'vertical';
   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 {
@@ -71,9 +80,7 @@ interface State {
 }
 
 export default class Options extends Component<Props, State> {
-  state: State = {
+  typeSelect?: HTMLSelectElement;
-    encoderSupportMap: undefined,
-  };
 
   constructor() {
     super();
@@ -114,9 +121,19 @@ 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,
@@ -127,65 +144,64 @@ export default class Options extends Component<Props, State> {
     const EncoderOptionComponent = encoderOptionsComponentMap[encoderState.type];
 
     return (
-      <div class={style.optionsScroller}>
+      <div class={`${style.options} ${style[orientation]}`}>
-        <Expander>
+        <h2 class={style.title}>
-          {encoderState.type === identity.type ? null :
+          {titles[orientation][imageIndex]}
-            <div>
+          {', '}
-              <h3 class={style.optionsTitle}>Edit</h3>
+          {encoderMap[encoderState.type].label}
-              <label class={style.sectionEnabler}>
+        </h2>
-                <Checkbox
+
+        <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
                   name="resize.enable"
+                  type="checkbox"
                   checked={!!preprocessorState.resize.enabled}
                   onChange={this.onPreprocessorEnabledChange}
                 />
                 Resize
               </label>
-              <Expander>
+              {preprocessorState.resize.enabled &&
-                {preprocessorState.resize.enabled ?
+                <ResizeOptionsComponent
-                  <ResizeOptionsComponent
+                  isVector={Boolean(source && source.vectorImage)}
-                    isVector={Boolean(source && source.vectorImage)}
+                  aspect={source ? (source.data.width / source.data.height) : 1}
-                    aspect={source ? (source.data.width / source.data.height) : 1}
+                  options={preprocessorState.resize}
-                    options={preprocessorState.resize}
+                  onChange={this.onResizeOptionsChange}
-                    onChange={this.onResizeOptionsChange}
+                />
-                  />
+              }
-                : null}
+              <label class={style.toggle}>
-              </Expander>
+                <input
-              <label class={style.sectionEnabler}>
-                <Checkbox
                   name="quantizer.enable"
+                  type="checkbox"
                   checked={!!preprocessorState.quantizer.enabled}
                   onChange={this.onPreprocessorEnabledChange}
                 />
-                Reduce palette
+                Quantize
               </label>
-              <Expander>
+              {preprocessorState.quantizer.enabled &&
-                {preprocessorState.quantizer.enabled ?
+                <QuantizerOptionsComponent
-                  <QuantizerOptionsComponent
+                  options={preprocessorState.quantizer}
-                    options={preprocessorState.quantizer}
+                  onChange={this.onQuantizerOptionsChange}
-                    onChange={this.onQuantizerOptionsChange}
+                />
-                  />
+              }
-                : null}
-              </Expander>
             </div>
-          }
+          )}
-        </Expander>
 
-        <h3 class={style.optionsTitle}>Compress</h3>
+          {EncoderOptionComponent &&
-
-        <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
@@ -194,8 +210,33 @@ export default class Options extends Component<Props, State> {
               }
               onChange={onEncoderOptionsChange}
             />
-          : null}
+          }
-        </Expander>
+        </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>
       </div>
     );
   }

src/components/Options/style.scss

@@ -1,58 +1,225 @@
-$horizontalPadding: 15px;
+/*
+Note: These styles are temporary. They will be replaced before going live.
+*/
 
-.options-title {
+.row {
-  background: rgba(0, 0, 0, 0.9);
+  padding: 5px;
-  margin: 0;
+  margin: 0 10px;
-  padding: 10px $horizontalPadding;
-  font-weight: normal;
-  font-size: 1.4rem;
-  border-bottom: 1px solid #000;
 }
 
-.option-text-first {
+.options {
-  display: grid;
-  align-items: center;
-  grid-template-columns: 87px 1fr;
-  grid-gap: 0.7em;
-  padding: 10px $horizontalPadding;
-}
-
-.option-one-cell {
-  display: grid;
-  grid-template-columns: 1fr;
-  padding: 10px $horizontalPadding;
-}
-
-.option-input-first,
-.section-enabler {
-  cursor: pointer;
-  display: grid;
-  align-items: center;
-  grid-template-columns: auto 1fr;
-  grid-gap: 0.7em;
-  padding: 10px $horizontalPadding;
-}
-
-.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);
+  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);
+  }
 }
 
-.options-scroller {
+.picker {
-  overflow-x: hidden;
+  margin: 5px 15px;
-  overflow-y: auto;
+
-  -webkit-overflow-scrolling: touch;
+  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 {
+  font-weight: normal;
+}
+
+.increase,
+.decrease {
+  font-style: italic;
+  filter: #{"grayscale(calc(50% - var(--size-delta, 50) * 0.5%))"};
+
+  &:before {
+    content: ' (';
+  }
+  &:after {
+    content: ')';
+  }
+}
+
+.increase {
+  color: var(--negative);
+}
+.decrease {
+  color: var(--positive);
+}
+
+.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);
+}
+
+.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);
 }

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;

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';

src/components/Output/custom-els/TwoUp/styles.css

@@ -52,11 +52,11 @@ two-up[legacy-clip-compat] > :not(.two-up-handle) {
   height: calc(var(--thumb-size) * 0.9);
   background: var(--thumb-background);
   border: 1px solid rgba(0,0,0,0.2);
-  border-radius: var(--thumb-size);
+  border-radius: calc(var(--thumb-size) * 0.08);
   box-shadow: 0 1px 4px rgba(0,0,0,0.1);
   color: var(--thumb-color);
   box-sizing: border-box;
-  padding: 0 calc(var(--thumb-size) * 0.24);
+  padding: 0 48%;
 }
 
 .scrubber svg {

src/components/Output/index.tsx

@@ -10,7 +10,7 @@ import { twoUpHandle } from './custom-els/TwoUp/styles.css';
 
 interface Props {
   originalImage?: ImageData;
-  mobileView: boolean;
+  orientation: 'horizontal' | 'vertical';
   leftCompressed?: ImageData;
   rightCompressed?: ImageData;
   leftImgContain: boolean;
@@ -177,21 +177,13 @@ export default class Output extends Component<Props, State> {
     const clonedEvent = new (event.constructor as typeof Event)(event.type, event);
     this.retargetedEvents.add(clonedEvent);
     this.pinchZoomLeft.dispatchEvent(clonedEvent);
-
-    // Unfocus any active element on touchend. This fixes an issue on (at least) Android Chrome,
-    // where the software keyboard is hidden, but the input remains focused, then after interaction
-    // with this element the keyboard reappears for NO GOOD REASON. Thanks Android.
-    if (
-      event.type === 'touchend' &&
-      document.activeElement &&
-      document.activeElement instanceof HTMLElement
-    ) {
-      document.activeElement.blur();
-    }
   }
 
   render(
-    { mobileView, leftImgContain, rightImgContain, originalImage }: Props,
+    {
+      orientation, leftCompressed, rightCompressed, leftImgContain, rightImgContain,
+      originalImage,
+    }: Props,
     { scale, editingScale, altBackground }: State,
   ) {
     const leftDraw = this.leftDrawable();
@@ -202,7 +194,7 @@ export default class Output extends Component<Props, State> {
         <two-up
           legacy-clip-compat
           class={style.twoUp}
-          orientation={mobileView ? 'vertical' : 'horizontal'}
+          orientation={orientation}
           // Event redirecting. See onRetargetableEvent.
           onTouchStartCapture={this.onRetargetableEvent}
           onTouchEndCapture={this.onRetargetableEvent}

src/components/Output/style.scss

@@ -1,3 +1,7 @@
+/*
+Note: These styles are temporary. They will be replaced before going live.
+*/
+
 .output {
   composes: abs-fill from '../../lib/util.scss';
 
@@ -43,16 +47,10 @@
   flex-wrap: wrap;
   contain: content;
 
-  // Allow clicks to fall through to the pinch zoom area
+  @media (min-width: 680px) {
-  pointer-events: none;
-  & > * {
-    pointer-events: auto;
-  }
-
-  @media (min-width: 860px) {
     top: auto;
-    left: 320px;
+    left: 220px;
-    right: 320px;
+    right: 220px;
     bottom: 0;
   }
 }
@@ -129,8 +127,4 @@
 
 .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;
 }

src/components/checkbox/index.tsx

@@ -1,20 +0,0 @@
-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>
-    );
-  }
-}

src/components/checkbox/style.scss

@@ -1,22 +0,0 @@
-.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;
-}

src/components/compress/custom-els/MultiPanel/missing-types.d.ts

@@ -1,9 +0,0 @@
-interface MultiPanelAttributes extends JSX.HTMLAttributes {
-  'open-one-only'?: boolean;
-}
-
-declare namespace JSX {
-  interface IntrinsicElements {
-    'multi-panel': MultiPanelAttributes;
-  }
-}

src/components/compress/custom-els/MultiPanel/styles.css

@@ -1,10 +0,0 @@
-.panel-heading {
-  background: gray;
-}
-.panel-content {
-  height: 0px;
-  overflow: auto;
-}
-.panel-content[aria-expanded=true] {
-  height: auto;
-}

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';
-import './custom-els/MultiPanel';
+
-import Results from '../results';
+type Orientation = 'horizontal' | 'vertical';
-import { ExpandIcon, CopyAcrossIconProps } from '../../lib/icons';
-import SnackBarElement from 'src/lib/SnackBar';
 
 export interface SourceImage {
   file: File | Fileish;
@@ -59,17 +59,15 @@ interface EncodedImage {
 
 interface Props {
   file: File | Fileish;
-  showSnack: SnackBarElement['showSnackbar'];
+  onError: (msg: string) => void;
 }
 
 interface State {
   source?: SourceImage;
   images: [EncodedImage, EncodedImage];
-  /** Source image load */
   loading: boolean;
-  loadingCounter: number;
   error?: string;
-  mobileView: boolean;
+  orientation: Orientation;
 }
 
 interface UpdateImageOptions {
@@ -137,7 +135,7 @@ 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);
@@ -155,19 +153,12 @@ 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('(max-width: 599px)');
+  widthQuery = window.matchMedia('(min-width: 500px)');
 
   state: State = {
     source: undefined,
     loading: false,
-    loadingCounter: 0,
     images: [
       {
         preprocessorState: defaultPreprocessorState,
@@ -184,7 +175,7 @@ export default class Compress extends Component<Props, State> {
         loading: false,
       },
     ],
-    mobileView: this.widthQuery.matches,
+    orientation: this.widthQuery.matches ? 'horizontal' : 'vertical',
   };
 
   private readonly encodeCache = new ResultCache();
@@ -199,7 +190,7 @@ export default class Compress extends Component<Props, State> {
 
   @bind
   private onMobileWidthChange() {
-    this.setState({ mobileView: this.widthQuery.matches });
+    this.setState({ orientation: this.widthQuery.matches ? 'horizontal' : 'vertical' });
   }
 
   private onEncoderTypeChange(index: 0 | 1, newType: EncoderType): void {
@@ -251,31 +242,17 @@ export default class Compress extends Component<Props, State> {
     }
   }
 
-  private async onCopyToOtherClick(index: 0 | 1) {
+  private 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) {
-    const loadingCounter = this.state.loadingCounter + 1;
+    this.setState({ loading: true });
-
-    this.setState({ loadingCounter, loading: true });
 
     // Abort any current encode jobs, as they're redundant now.
     this.leftProcessor.abortCurrent();
@@ -296,9 +273,6 @@ 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 },
@@ -329,9 +303,7 @@ export default class Compress extends Component<Props, State> {
     } catch (err) {
       if (err.name === 'AbortError') return;
       console.error(err);
-      // Another file has been opened before this one processed.
+      this.props.onError('Invalid image');
-      if (this.state.loadingCounter !== loadingCounter) return;
-      this.props.showSnack('Invalid image');
       this.setState({ loading: false });
     }
   }
@@ -390,7 +362,7 @@ export default class Compress extends Component<Props, State> {
         }
       } catch (err) {
         if (err.name === 'AbortError') return;
-        this.props.showSnack(`Processing error (type=${image.encoderState.type}): ${err}`);
+        this.props.onError(`Processing error (type=${image.encoderState.type}): ${err}`);
         throw err;
       }
     }
@@ -413,73 +385,39 @@ export default class Compress extends Component<Props, State> {
     this.setState({ images });
   }
 
-  render({ }: Props, { loading, images, source, mobileView }: State) {
+  render({ }: Props, { loading, images, source, orientation }: 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}
-          mobileView={mobileView}
+          orientation={orientation}
           leftCompressed={leftImageData}
           rightCompressed={rightImageData}
           leftImgContain={leftImage.preprocessorState.resize.fitMethod === 'cover'}
           rightImgContain={rightImage.preprocessorState.resize.fitMethod === 'cover'}
         />
-        {mobileView
+        <div class={`${style.optionPair} ${style[orientation]}`}>
-          ? (
+          {images.map((image, index) => (
-            <div class={style.options}>
+            <Options
-              <multi-panel class={style.multiPanel} open-one-only>
+              source={source}
-                {results[0]}
+              orientation={orientation}
-                {options[0]}
+              imageIndex={index}
-                {results[1]}
+              imageFile={image.file}
-                {options[1]}
+              downloadUrl={image.downloadUrl}
-              </multi-panel>
+              preprocessorState={image.preprocessorState}
-            </div>
+              encoderState={image.encoderState}
-          ) : ([
+              onEncoderTypeChange={this.onEncoderTypeChange.bind(this, index)}
-            <div class={style.options} key="options0">
+              onEncoderOptionsChange={this.onEncoderOptionsChange.bind(this, index)}
-              {options[0]}
+              onPreprocessorOptionsChange={this.onPreprocessorOptionsChange.bind(this, index)}
-              {results[0]}
+              onCopyToOtherClick={this.onCopyToOtherClick.bind(this, index)}
-            </div>,
+            />
-            <div class={style.options} key="options1">
+          ))}
-              {options[1]}
+        </div>
-              {results[1]}
+        {anyLoading && <span style={{ position: 'fixed', top: 0, left: 0 }}>Loading...</span>}
-            </div>,
-          ])
-        }
       </div>
     );
   }

src/components/compress/style.scss

@@ -1,74 +1,19 @@
 .compress {
+  height: 100%;
+}
+
+.option-pair {
+  display: flex;
   width: 100%;
   height: 100%;
-  contain: strict;
-  display: grid;
-  align-items: end;
-  align-content: end;
-  grid-template-rows: 1fr auto;
 
-  @media (min-width: 600px) {
+  &.horizontal {
-    grid-template-columns: 1fr auto;
+    justify-content: space-between;
-    grid-template-rows: 100%;
+    align-items: flex-end;
+  }
+
+  &.vertical {
+    flex-direction: column;
+    justify-content: flex-end;
   }
 }
-
-.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: calc(100% - 40px);
-  }
-}
-
-.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;
-}

src/components/expander/index.tsx

@@ -1,71 +0,0 @@
-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>
-    );
-  }
-}

src/components/expander/style.scss

@@ -1,5 +0,0 @@
-.children-exiting {
-  & > * {
-    pointer-events: none;
-  }
-}

src/components/intro/index.tsx

@@ -12,7 +12,6 @@ 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 = [
   {
@@ -43,7 +42,7 @@ const demos = [
 
 interface Props {
   onFile: (file: File | Fileish) => void;
-  showSnack: SnackBarElement['showSnackbar'];
+  onError: (error: string) => void;
 }
 interface State {
   fetchingDemoIndex?: number;
@@ -80,7 +79,7 @@ export default class Intro extends Component<Props, State> {
       this.props.onFile(file);
     } catch (err) {
       this.setState({ fetchingDemoIndex: undefined });
-      this.props.showSnack("Couldn't fetch demo image");
+      this.props.onError("Couldn't fetch demo image");
     }
   }
 

src/components/intro/style.scss

@@ -19,6 +19,7 @@
 }
 
 .intro {
+  composes: abs-fill from '../../lib/util.scss';
   display: grid;
   grid-template-rows: 1fr min-content;
   align-items: center;
@@ -28,9 +29,6 @@
   -webkit-overflow-scrolling: touch;
   overflow: auto;
   padding: 20px 0 0;
-  height: 100%;
-  box-sizing: border-box;
-  overscroll-behavior: contain;
 }
 
 .logo-container {

src/components/output/custom-els/MultiPanel/index.ts

@@ -1,75 +1,19 @@
-import * as style from './styles.css';
+import './styles.css';
-import { transitionHeight } from '../../../../lib/util';
 
-interface CloseAllOptions {
+function getClosestHeading(el: Element) {
-  exceptFirst?: boolean;
+  const closestEl = el.closest('multi-panel > *');
-}
+  if (closestEl && closestEl.classList.contains('panel-heading')) {
-
+    return closestEl;
-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();
@@ -87,18 +31,12 @@ 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 HTMLElement;
+    const el = event.target as Element;
     const heading = getClosestHeading(el);
     if (!heading) return;
-    this._toggle(heading);
+    this._expand(heading);
   }
 
   // KeyDown event handler
@@ -115,8 +53,7 @@ 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':
@@ -140,7 +77,7 @@ export default class MultiPanel extends HTMLElement {
       case 'Enter':
       case ' ':
       case 'Spacebar':
-        this._toggle(heading);
+        this._expand(heading);
         break;
 
       // Any other key press is ignored and passed back to the browser.
@@ -156,32 +93,26 @@ export default class MultiPanel extends HTMLElement {
     }
   }
 
-  private _toggle(heading: HTMLElement) {
+  private _expand(heading: Element) {
     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 (heading.hasAttribute('content-expanded')) {
+    if (content.hasAttribute('expanded')) {
-      close(heading);
+      content.removeAttribute('expanded');
+      content.setAttribute('aria-expanded', 'false');
     } else {
-      if (this.openOneOnly) this._closeAll();
+      content.setAttribute('expanded', '');
-      open(heading);
+      content.setAttribute('aria-expanded', 'true');
     }
   }
 
-  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 = false;
+    let preserveTabIndex : boolean = false;
     let heading = this.firstElementChild;
 
     while (heading) {
@@ -192,23 +123,31 @@ 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.');
-        break;
+        heading = null;
+        continue;
       }
 
       // 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(style.panelContent);
+      heading.classList.remove('panel-content');
-      content.classList.remove(style.panelHeading);
+
-      heading.removeAttribute('aria-expanded');
+      if (content.classList.contains('panel-heading')) {
-      heading.removeAttribute('content-expanded');
+        content.classList.remove('panel-heading');
+      }
+      if (heading.hasAttribute('expanded') && heading.hasAttribute('aria-expanded')) {
+        heading.removeAttribute('expanded');
+        heading.removeAttribute('aria-expanded');
+      }
 
       // If appreciable, remove tabindex from content which used to be header.
-      content.removeAttribute('tabindex');
+      if (content.hasAttribute('tabindex')) {
+        content.removeAttribute('tabindex');
+      }
 
       // Assign heading and content classes
-      heading.classList.add(style.panelHeading);
+      heading.classList.add('panel-heading');
-      content.classList.add(style.panelContent);
+      content.classList.add('panel-content');
 
       // Assign ids and aria-X for heading/content pair.
       heading.id = `panel-heading-${randomId}`;
@@ -224,13 +163,6 @@ 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;
     }
@@ -239,9 +171,6 @@ 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.
@@ -279,7 +208,7 @@ 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(style.panelHeading)) {
+    if (lastEl && lastEl.classList.contains('panel-heading')) {
       return lastEl;
     }
     // otherwise return 2nd from the last
@@ -288,21 +217,6 @@ 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);

src/components/output/custom-els/MultiPanel/styles.css

@@ -0,0 +1,11 @@
+multi-panel > .panel-heading {
+  background:gray;
+}
+multi-panel > .panel-content {
+  height:0px;
+  overflow:scroll;
+  transition: height 1s;
+}
+multi-panel > .panel-content[expanded] {
+  height:auto;
+}

src/components/range/index.tsx

@@ -1,55 +0,0 @@
-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>
-    );
-  }
-}

src/components/range/style.scss

@@ -1,55 +0,0 @@
-.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;
-  }
-}

src/components/results/FileSize.tsx

@@ -1,41 +0,0 @@
-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>;
-  }
-}

src/components/results/index.tsx

@@ -1,105 +0,0 @@
-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>
-    );
-  }
-}

src/components/results/style.scss

@@ -1,131 +0,0 @@
-@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;
-}

src/components/select/index.tsx

@@ -1,20 +0,0 @@
-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>
-    );
-  }
-}

src/components/select/style.scss

@@ -1,33 +0,0 @@
-.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;
-  }
-}

src/custom-els/RangeInput/index.ts

@@ -1,20 +1,15 @@
-import PointerTracker from 'pointer-tracker';
 import { bind } from '../../lib/initial-util';
-import * as style from './styles.css';
+import './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: HTMLInputElement;
+  private _input = document.createElement('input');
-  private _valueDisplay?: HTMLDivElement;
+  private _valueDisplayWrapper = document.createElement('div');
+  private _valueDisplay = document.createElement('span');
   private _ignoreChange = false;
 
   static get observedAttributes() {
@@ -23,20 +18,7 @@ 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);
@@ -47,20 +29,6 @@ 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') || '';
   }
@@ -69,6 +37,14 @@ 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) {
@@ -89,15 +65,15 @@ class RangeInputElement extends HTMLElement {
 
   @bind
   private _update() {
-    const value = Number(this.value) || 0;
+    const value = parseFloat(this.value || '0');
-    const min = Number(this.min) || 0;
+    const min = parseFloat(this.min || '0');
-    const max = Number(this.max) || 100;
+    const max = parseFloat(this.max || '100');
-    const labelPrecision = Number(this.labelPrecision) || getPrescision(this.step) || 0;
+    const labelPrecision = parseFloat(this.labelPrecision || '0');
     const percent = 100 * (value - min) / (max - min);
-    const displayValue = labelPrecision ? value.toFixed(labelPrecision) :
+    const displayValue = labelPrecision ? value.toPrecision(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);
   }

src/custom-els/RangeInput/missing-types.d.ts

@@ -1,5 +1,9 @@
 declare namespace JSX {
+  interface RangeInputAttributes extends HTMLAttributes {
+    reversed?: boolean;
+  }
+
   interface IntrinsicElements {
-    'range-input': HTMLAttributes;
+    'range-input': RangeInputAttributes;
   }
 }

src/custom-els/RangeInput/styles.css

@@ -14,6 +14,41 @@ 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;
@@ -22,33 +57,32 @@ 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;
 }
 
-.input {
+range-input input::-webkit-slider-thumb {
-  position: relative;
+  appearance: none;
-  width: 100%;
+  -webkit-appearance: none;
-  padding: 0;
+  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;
-  margin: 0;
+  box-sizing: content-box;
-  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;
 }
 
-.thumb-wrapper {
+range-input input:focus::-webkit-slider-thumb {
+  box-shadow: 0 1px 3px rgba(0,0,0,0.5);
+}
+
+range-input > div {
   position: absolute;
   left: 6px;
   right: 6px;
@@ -57,8 +91,8 @@ range-input::before {
   overflow: visible;
 }
 
-.value-display {
+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="%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;
+  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;
   position: absolute;
   box-sizing: border-box;
   left: var(--value-percent, 0%);
@@ -77,18 +111,12 @@ range-input::before {
   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: all 200ms ease;
+  transition: transform 200ms ease, opacity 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);
-}

src/lib/PointerTracker/index.ts

@@ -0,0 +1,255 @@
+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);
+    }
+  }
+}

src/lib/PointerTracker/missing-types.d.ts

@@ -0,0 +1,10 @@
+// TypeScript, you make me sad.
+// https://github.com/Microsoft/TypeScript/issues/18756
+interface Window {
+  PointerEvent: typeof PointerEvent;
+  Touch: typeof Touch;
+}
+
+interface PointerEvent {
+  getCoalescedEvents(): PointerEvent[];
+}

src/lib/SnackBar/index.ts

@@ -1,96 +1,114 @@
-import * as style from './styles.css';
+import './styles.css';
+
+const DEFAULT_TIMEOUT = 2750;
 
 export interface SnackOptions {
+  message: string;
   timeout?: number;
-  actions?: string[];
+  actionText?: string;
+  actionHandler?: () => boolean | null;
 }
 
-function createSnack(message: string, options: SnackOptions): [Element, Promise<string>] {
+export interface SnackShowResult {
-  const {
+  action: boolean;
-    timeout = 0,
+}
-    actions = [],
-  } = options;
 
-  // Provide a default 'dismiss' action
+class Snack {
-  if (!timeout && actions.length === 0) actions.push('dismiss');
+  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,
+  };
 
-  const el = document.createElement('div');
+  constructor (options: SnackOptions, callback?: (result: SnackShowResult) => void) {
-  el.className = style.snackbar;
+    this._options = options;
-  el.setAttribute('aria-live', 'assertive');
-  el.setAttribute('aria-atomic', 'true');
-  el.setAttribute('aria-hidden', 'false');
 
-  const text = document.createElement('div');
+    this._element.className = 'snackbar';
-  text.className = style.text;
+    this._element.setAttribute('aria-live', 'assertive');
-  text.textContent = message;
+    this._element.setAttribute('aria-atomic', 'true');
-  el.appendChild(text);
+    this._element.setAttribute('aria-hidden', 'true');
 
-  const result = new Promise<string>((resolve) => {
+    this._text.className = 'snackbar--text';
-    let timeoutId: number;
+    this._text.textContent = options.message;
+    this._element.appendChild(this._text);
 
-    // Add action buttons
+    if (options.actionText) {
-    for (const action of actions) {
+      this._button.className = 'snackbar--button';
-      const button = document.createElement('button');
+      this._button.textContent = options.actionText;
-      button.className = style.button;
+      this._button.addEventListener('click', () => {
-      button.textContent = action;
+        if (this._showing) {
-      button.addEventListener('click', () => {
+          if (options.actionHandler && options.actionHandler() === false) return;
-        clearTimeout(timeoutId);
+          this._result.action = true;
-        resolve(action);
+        }
+        this.hide();
       });
-      el.appendChild(button);
+      this._element.appendChild(this._button);
     }
 
-    // Add timeout
+    if (callback) {
-    if (timeout) {
+      this._onremove.push(callback);
-      timeoutId = self.setTimeout(
-        () => resolve(''),
-        timeout,
-      );
     }
-  });
+  }
 
-  return [el, result];
+  cancelTimer () {
-}
+    if (this._closeTimer != null) clearTimeout(this._closeTimer);
+  }
 
-export default class SnackBarElement extends HTMLElement {
+  show (parent: Element): Promise<SnackShowResult> {
-  private _snackbars: [string, SnackOptions, (action: Promise<string>) => void][] = [];
+    if (this._showing) return Promise.resolve(this._result);
-  private _processingQueue = false;
+    this._showing = true;
-
+    this.cancelTimer();
-  /**
+    if (parent !== this._element.parentNode) {
-   * Show a snackbar. Returns a promise for the name of the action clicked, or an empty string if no
+      parent.appendChild(this._element);
-   * action is clicked.
+    }
-   */
+    this._element.removeAttribute('aria-hidden');
-  showSnackbar(message: string, options: SnackOptions = {}): Promise<string> {
+    this._closeTimer = setTimeout(this.hide.bind(this), this._options.timeout || DEFAULT_TIMEOUT);
-    return new Promise<string>((resolve) => {
+    return new Promise((resolve) => {
-      this._snackbars.push([message, options, resolve]);
+      this._onremove.push(resolve);
-      if (!this._processingQueue) this._processQueue();
     });
   }
 
-  private async _processQueue() {
+  hide () {
-    this._processingQueue = true;
+    if (!this._showing) return;
+    this._showing = false;
+    this.cancelTimer();
+    this._element.addEventListener('animationend', this.remove.bind(this));
+    this._element.setAttribute('aria-hidden', 'true');
+  }
 
-    while (this._snackbars[0]) {
+  remove () {
-      const [message, options, resolver] = this._snackbars[0];
+    this.cancelTimer();
-      const [el, result] = createSnack(message, options);
+    const parent = this._element.parentNode;
-      // Pass the result back to the original showSnackbar call.
+    if (parent) parent.removeChild(this._element);
-      resolver(result);
+    this._onremove.forEach(f => f(this._result));
-      this.appendChild(el);
+    this._onremove = [];
+  }
+}
 
-      // Wait for the user to click an action, or for the snack to timeout.
+export default class SnackBarElement extends HTMLElement {
-      await result;
+  private _snackbars: Snack[] = [];
+  private _processingStack = false;
 
-      // Transition the snack away.
+  showSnackbar (options: SnackOptions): Promise<SnackShowResult> {
-      el.setAttribute('aria-hidden', 'true');
+    return new Promise((resolve) => {
-      await new Promise((resolve) => {
+      const snack = new Snack(options, resolve);
-        el.addEventListener('animationend', () => resolve());
+      this._snackbars.push(snack);
-      });
+      this._processStack();
-      el.remove();
+    });
+  }
 
-      this._snackbars.shift();
+  private async _processStack () {
-    }
+    if (this._processingStack === true || this._snackbars.length === 0) return;
-
+    this._processingStack = true;
-    this._processingQueue = false;
+    await this._snackbars[0].show(this);
+    this._snackbars.shift();
+    this._processingStack = false;
+    this._processStack();
   }
 }
 

src/lib/SnackBar/styles.css

@@ -22,6 +22,7 @@ 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;
@@ -52,13 +53,13 @@ snack-bar {
   }
 }
 
-.text {
+.snackbar--text {
   flex: 1 1 auto;
   padding: 16px;
   font-size: 100%;
 }
 
-.button {
+.snackbar--button {
   position: relative;
   flex: 0 1 auto;
   padding: 8px;
@@ -74,15 +75,16 @@ 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;
 }
-.button:hover {
+.snackbar--button:hover {
   background-color: rgba(0,0,0,0.15);
 }
-.button:focus:before {
+.snackbar--button:focus:before {
   content: '';
   position: absolute;
   left: 50%;

src/lib/icons.tsx

@@ -8,7 +8,7 @@ const Icon = (props: JSX.HTMLAttributes) => (
 
 export const DownloadIcon = (props: JSX.HTMLAttributes) => (
   <Icon {...props}>
-    <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"/>
+    <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" />
   </Icon>
 );
 
@@ -29,46 +29,3 @@ export const RemoveIcon = (props: JSX.HTMLAttributes) => (
     <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>
-  );
-};

src/lib/util.ts

@@ -57,32 +57,16 @@ export async function canvasEncode(data: ImageData, type: string, quality?: numb
   return blob;
 }
 
-async function decodeImage(url: string): Promise<HTMLImageElement> {
-  const img = new Image();
-  img.decoding = 'async';
-  img.src = url;
-  const loaded = new Promise((resolve, reject) => {
-    img.onload = () => resolve();
-    img.onerror = () => reject(Error('Image loading error'));
-  });
-
-  if (img.decode) {
-    // Nice off-thread way supported in Safari/Chrome.
-    // Safari throws on decode if the source is SVG.
-    // https://bugs.webkit.org/show_bug.cgi?id=188347
-    await img.decode().catch(() => null);
-  }
-
-  // Always await loaded, as we may have bailed due to the Safari bug above.
-  await loaded;
-  return img;
-}
-
 /**
  * Attempts to load the given URL as an image.
  */
-export function canDecodeImage(url: string): Promise<boolean> {
+export function canDecodeImage(data: string): Promise<boolean> {
-  return decodeImage(url).then(() => true, () => false);
+  return new Promise((resolve) => {
+    const img = document.createElement('img');
+    img.src = data;
+    img.onload = _ => resolve(true);
+    img.onerror = _ => resolve(false);
+  });
 }
 
 export function blobToArrayBuffer(blob: Blob): Promise<ArrayBuffer> {
@@ -124,7 +108,24 @@ export async function blobToImg(blob: Blob): Promise<HTMLImageElement> {
   const url = URL.createObjectURL(blob);
 
   try {
-    return await decodeImage(url);
+    const img = new Image();
+    img.decoding = 'async';
+    img.src = url;
+    const loaded = new Promise((resolve, reject) => {
+      img.onload = () => resolve();
+      img.onerror = () => reject(Error('Image loading error'));
+    });
+
+    if (img.decode) {
+      // Nice off-thread way supported in Safari/Chrome.
+      // Safari throws on decode if the source is SVG.
+      // https://bugs.webkit.org/show_bug.cgi?id=188347
+      await img.decode().catch(() => null);
+    }
+
+    // Always await loaded, as we may have bailed due to the Safari bug above.
+    await loaded;
+    return img;
   } finally {
     URL.revokeObjectURL(url);
   }
@@ -202,40 +203,25 @@ 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, defaultVal: number = 0): number {
+export function inputFieldValueAsNumber(field: any): number {
-  if (!field) return defaultVal;
+  return Number((field as HTMLInputElement).value);
-  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, defaultVal: number = 0): number {
+export function inputFieldCheckedAsNumber(field: any): 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, defaultVal: boolean = false): boolean {
+export function inputFieldChecked(field: any): 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.
  */
@@ -257,43 +243,3 @@ 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);
-  });
-}

src/style/index.scss

@@ -1,7 +1,12 @@
+/*
+Note: These styles are temporary. They will be replaced before going live.
+*/
+
 @import './reset.scss';
 
 html, body {
   height: 100%;
+  width: 100%;
   padding: 0;
   margin: 0;
   font: 12px/1.3 system-ui, -apple-system, BlinkMacSystemFont, Roboto, Helvetica, sans-serif;

src/style/reset.scss

@@ -1,3 +1,7 @@
+/*
+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);
 }

webpack.config.js

@@ -23,9 +23,7 @@ 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 {
@@ -108,7 +106,7 @@ module.exports = function (_, env) {
               loader: 'typings-for-css-modules-loader',
               options: {
                 modules: true,
-                localIdentName: isProd ? '[hash:base64:5]' : '[local]__[hash:base64:5]',
+                localIdentName: '[local]__[hash:base64:5]',
                 namedExport: true,
                 camelCase: true,
                 importLoaders: 1,
@@ -200,11 +198,8 @@ module.exports = function (_, env) {
 
       new OptimizeCssAssetsPlugin({
         cssProcessorOptions: {
-          postcssReduceIdents: {
+          zindex: false,
-            counterStyle: false,
+          discardComments: { removeAll: true }
-            gridTemplate: false,
-            keyframes: false
-          }
         }
       }),