Add eslint & update README

.eslintrc

@@ -0,0 +1,6 @@
+{
+  "extends": "airbnb-base",
+  "rules": {
+    "no-underscore-dangle": 0
+  }
+}

.npmignore

@@ -1,2 +1,4 @@
+.eslintrc
+.github
 tests
 examples

README.md

@@ -1,6 +1,10 @@
 FFmpeg.js
 =========
 
+<p align="center">
+<a href="#"><img alt="Tesseract.js" src="https://github.com/naptha/tesseract.js/raw/master/docs/images/cover.png"></a>
+</p>
+
 A FFmpeg WebAssembly version built from scratch, you can learn how to do it from this series of stories: [Build FFmpeg WebAssembly version (=ffmpeg.js)](https://medium.com/@jeromewus/build-ffmpeg-webassembly-version-ffmpeg-js-part-1-preparation-ed12bf4c8fac).
 
 ---

package.json

@@ -7,7 +7,8 @@
     "example": "examples"
   },
   "scripts": {
-    "test": "mocha"
+    "test": "mocha",
+    "lint": "eslint src"
   },
   "repository": {
     "type": "git",
@@ -26,5 +27,10 @@
   "homepage": "https://github.com/jeromewu/ffmpeg.js#readme",
   "dependencies": {
     "@ffmpeg/core": "^0.1.0"
+  },
+  "devDependencies": {
+    "eslint": "^6.1.0",
+    "eslint-config-airbnb-base": "^14.0.0",
+    "eslint-plugin-import": "^2.18.2"
   }
 }

src/load.js

@@ -1,8 +1,8 @@
-const { setModule } = require('./util/module');
 const FFmpegCore = require('@ffmpeg/core');
+const { setModule } = require('./util/module');
 
 module.exports = () => (
-  new Promise((resolve, reject) => {
+  new Promise((resolve) => {
     FFmpegCore()
       .then((Module) => {
         setModule(Module);

src/util/module.js

@@ -1,6 +1,6 @@
 let Module = null;
 
-exports.setModule = m => {
+exports.setModule = (m) => {
   Module = m;
 };
 

src/util/str2ptr.js

@@ -3,7 +3,7 @@ const { getModule } = require('./module');
 module.exports = (s) => {
   const Module = getModule();
   const ptr = Module._malloc((s.length + 1) * Uint8Array.BYTES_PER_ELEMENT);
-  for (let i = 0; i < s.length; i++) {
+  for (let i = 0; i < s.length; i += 1) {
     Module.setValue(ptr + i, s.charCodeAt(i), 'i8');
   }
   Module.setValue(ptr + s.length, 0, 'i8');