From df7e112d22495415d3e91bf62f77db806934dff8 Mon Sep 17 00:00:00 2001
From: Surma <surma@surma.link>
Date: Fri, 20 Jul 2018 10:53:31 +0100
Subject: [PATCH] Nits by Jake

---
 src/codecs/browser-webp/decoder.ts | 6 +++---
 src/codecs/webp/decoder.ts         | 6 +++---
 src/lib/util.ts                    | 2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/codecs/browser-webp/decoder.ts b/src/codecs/browser-webp/decoder.ts
index d7be3a37..d7b850a6 100644
--- a/src/codecs/browser-webp/decoder.ts
+++ b/src/codecs/browser-webp/decoder.ts
@@ -1,9 +1,8 @@
 import { canDecodeImage, createImageBitmapPolyfill } from '../../lib/util';
 
 export const name = 'Browser WebP Decoder';
-export const supportedMimeTypes = ['image/webp'];
-export async function decode(file: File): Promise<ImageBitmap> {
-  return createImageBitmapPolyfill(file);
+export async function decode(blob: Blob): Promise<ImageBitmap> {
+  return createImageBitmapPolyfill(blob);
 }
 
 // tslint:disable-next-line:max-line-length It’s a data URL. Whatcha gonna do?
@@ -13,6 +12,7 @@ export function isSupported(): Promise<boolean> {
   return canDecodeImage(webpFile);
 }
 
+const supportedMimeTypes = ['image/webp'];
 export function canHandleMimeType(mimeType: string): boolean {
   return supportedMimeTypes.includes(mimeType);
 }
diff --git a/src/codecs/webp/decoder.ts b/src/codecs/webp/decoder.ts
index 497d3eab..7f2e2649 100644
--- a/src/codecs/webp/decoder.ts
+++ b/src/codecs/webp/decoder.ts
@@ -2,10 +2,9 @@ import { blobToArrayBuffer, imageDataToBitmap } from '../../lib/util';
 import DecoderWorker  from './Decoder.worker';
 
 export const name = 'WASM WebP Decoder';
-export const supportedMimeTypes = ['image/webp'];
-export async function decode(file: File): Promise<ImageBitmap> {
+export async function decode(blob: Blob): Promise<ImageBitmap> {
   const decoder = await new DecoderWorker();
-  const imageData = await decoder.decode(await blobToArrayBuffer(file));
+  const imageData = await decoder.decode(await blobToArrayBuffer(blob));
   return imageDataToBitmap(imageData);
 }
 
@@ -13,6 +12,7 @@ export async function isSupported(): Promise<boolean> {
   return true;
 }
 
+const supportedMimeTypes = ['image/webp'];
 export function canHandleMimeType(mimeType: string): boolean {
   return supportedMimeTypes.includes(mimeType);
 }
diff --git a/src/lib/util.ts b/src/lib/util.ts
index 4af40c39..fbd92e8d 100644
--- a/src/lib/util.ts
+++ b/src/lib/util.ts
@@ -128,7 +128,7 @@ const magicNumberToMimeType = new Map<RegExp, string>([
   [/^RIFF....WEBPVP8 /, 'image/webp'],
 ]);
 
-export async function sniffMimeType(blob: Blob): Promise<string | ''> {
+export async function sniffMimeType(blob: Blob): Promise<string> {
   const firstChunk = await blobToArrayBuffer(blob.slice(0, 16));
   const firstChunkString =
     Array.from(new Uint8Array(firstChunk))