Fix lint errors

Author: jeromewu

packages/ffmpeg/src/classes.ts

@@ -13,7 +13,6 @@ import {
   LogEventCallback,
   ProgressEventCallback,
   FileData,
-  WorkerFSMountData,
   FFFSType,
   FFFSMountOptions,
   FFFSPath,

packages/ffmpeg/src/types.ts

@@ -153,7 +153,7 @@ export type CallbackData =
   | LogEvent
   | ProgressEvent
   | IsFirst
-  | OK
+  | OK // eslint-disable-line
   | Error
   | FSNode[]
   | undefined;
@@ -171,4 +171,4 @@ export interface FFMessageEventCallback {
     type: string;
     data: CallbackData;
   };
-}
+}

packages/ffmpeg/src/worker.ts

@@ -140,8 +140,8 @@ const deleteDir = ({ path }: FFMessageDeleteDirData): OK => {
 };
 
 const mount = ({ fsType, options, mountPoint }: FFMessageMountData): OK => {
-  let str = fsType as keyof typeof ffmpeg.FS.filesystems;
-  let fs = ffmpeg.FS.filesystems[str];
+  const str = fsType as keyof typeof ffmpeg.FS.filesystems;
+  const fs = ffmpeg.FS.filesystems[str];
   if (!fs) return false;
   ffmpeg.FS.mount(fs, options, mountPoint);
   return true;
@@ -158,7 +158,7 @@ self.onmessage = async ({
   const trans = [];
   let data: CallbackData;
   try {
-    if (type !== FFMessageType.LOAD && !ffmpeg) throw ERROR_NOT_LOADED;
+    if (type !== FFMessageType.LOAD && !ffmpeg) throw ERROR_NOT_LOADED; // eslint-disable-line
 
     switch (type) {
       case FFMessageType.LOAD: