add eslint

Author: Steffan

.eslintignore

@@ -0,0 +1,3 @@
+/node_modules
+/dist
+/test

.eslintrc.js

@@ -0,0 +1,44 @@
+module.exports = {
+  "root":true,
+  "env": {
+      "es6": true,
+      "browser": true,
+      "commonjs": true,
+  },
+  "extends": [
+      "eslint:recommended"
+  ],
+  "parserOptions": {
+      "sourceType": "module"
+  },
+  "rules": {
+      "brace-style": ["error", "1tbs", {"allowSingleLine": true}],
+      "comma-style": "error",
+      "comma-spacing": "error",
+      "eqeqeq": ["off", "smart"],
+      "indent": "off",
+      "indent-legacy": ["error", 4, {"SwitchCase": 1}],
+      "key-spacing": "error",
+      "keyword-spacing": "error",
+      "linebreak-style": ["error", "unix"],
+      "no-multi-spaces": "error",
+      "no-trailing-spaces": "error",
+      "no-lone-blocks": "error",
+      "no-extend-native": "error",
+      "no-unused-vars": ["error", {"vars": "local", "args": "none"}],
+      "no-empty": ["error", {"allowEmptyCatch": true}],
+      "no-duplicate-imports": "error",
+      "no-array-constructor": "error",
+      "no-multiple-empty-lines": "error",
+      "no-template-curly-in-string": "error",
+      "no-console": "off",
+      "object-curly-spacing": "error",
+      "quotes": ["error", "single", {"avoidEscape": true}],
+      "semi": ["error", "always"],
+      "space-infix-ops": "error",
+      "space-unary-ops": "error",
+      "space-in-parens": "error",
+      "space-before-blocks": "error",
+      "template-curly-spacing": "error"
+  }
+};

build/build.js

@@ -1,24 +1,26 @@
+/* eslint-env node */
+
 var fs = require('fs');
 var rollup = require('rollup');
 var uglify = require('uglify-js');
 var buble = require('rollup-plugin-buble');
-var package = require('../package.json');
+var {version} = require('../package.json');
 var banner =
-    "/*!\n" +
-    " * vue-event-manager v" + package.version + "\n" +
-    " * https://github.com/pagekit/vue-event-manager\n" +
-    " * Released under the MIT License.\n" +
-    " */\n";
+    '/*!\n' +
+    ' * vue-event-manager v' + version + '\n' +
+    ' * https://github.com/pagekit/vue-event-manager\n' +
+    ' * Released under the MIT License.\n' +
+    ' */\n';
 
 rollup.rollup({
-  input: 'src/index.js',
-  plugins: [buble()]
+    input: 'src/index.js',
+    plugins: [buble()]
 })
 .then(bundle =>
   bundle.generate({
-    format: 'umd',
-    banner: banner,
-    name: 'VueEventManager'
+      format: 'umd',
+      banner: banner,
+      name: 'VueEventManager'
   }).then(({code}) => write('dist/vue-event-manager.js', code, bundle))
 )
 .then(bundle =>
@@ -28,40 +30,40 @@ rollup.rollup({
 )
 .then(bundle =>
   bundle.generate({
-    format: 'es',
-    banner: banner
+      format: 'es',
+      banner: banner
   }).then(({code}) => write('dist/vue-event-manager.es2015.js', code, bundle))
 )
 .then(bundle =>
   bundle.generate({
-    format: 'cjs',
-    banner: banner
+      format: 'cjs',
+      banner: banner
   }).then(({code}) => write('dist/vue-event-manager.common.js', code, bundle))
 )
 .catch(logError);
 
 function read(path) {
-  return fs.readFileSync(path, 'utf8')
+    return fs.readFileSync(path, 'utf8');
 }
 
 function write(dest, code, bundle) {
-  return new Promise((resolve, reject) => {
-    fs.writeFile(dest, code, err => {
-      if (err) return reject(err);
-      console.log(blue(dest) + ' ' + getSize(code));
-      resolve(bundle);
+    return new Promise((resolve, reject) => {
+        fs.writeFile(dest, code, err => {
+            if (err) return reject(err);
+            console.log(blue(dest) + ' ' + getSize(code));
+            resolve(bundle);
+        });
     });
-  });
 }
 
 function getSize(code) {
-  return (code.length / 1024).toFixed(2) + 'kb';
+    return (code.length / 1024).toFixed(2) + 'kb';
 }
 
 function logError(e) {
-  console.log(e);
+    console.log(e);
 }
 
 function blue(str) {
-  return '\x1b[1m\x1b[34m' + str + '\x1b[39m\x1b[22m';
+    return '\x1b[1m\x1b[34m' + str + '\x1b[39m\x1b[22m';
 }

build/release.js

@@ -1,14 +1,16 @@
+/* eslint-env node */
+
 var replace = require('replace-in-file');
 var version = process.argv[2];
 
 replace({
-  files: "package.json",
-  from: /("version"\s*:\s*")\d+\.\d+\.\d+("\s*,)/g,
-  to: "$1" + version + "$2"
+    files: 'package.json',
+    from: /("version"\s*:\s*")\d+\.\d+\.\d+("\s*,)/g,
+    to: '$1' + version + '$2'
 });
 
 replace({
-  files: "README.md",
-  from: /(\/|@)\d+\.\d+\.\d+/g,
-  to: "$1" + version
+    files: 'README.md',
+    from: /(\/|@)\d+\.\d+\.\d+/g,
+    to: '$1' + version
 });

package.json

@@ -28,6 +28,7 @@
   "devDependencies": {
     "buble": "^0.18.0",
     "buble-loader": "^0.4.1",
+    "eslint": "^4.13.1",
     "jasmine": "^2.8.0",
     "jasmine-core": "^2.8.0",
     "karma": "^2.0.0",

src/EventManager.js

@@ -2,7 +2,7 @@
  * Event manager class.
  */
 
-import { isArray } from './util';
+import {isArray} from './util';
 
 export default class EventManager {
 

src/index.js

@@ -3,7 +3,7 @@
  */
 
 import EventManager from './EventManager';
-import { forEach, isArray, isObject } from './util';
+import {forEach, isArray, isObject} from './util';
 
 var Events = new EventManager();
 

src/util.js

@@ -18,6 +18,8 @@ export function forEach(collection, callback) {
  * Array.findIndex() polyfill.
  */
 if (!Array.prototype.findIndex) {
+
+    // eslint-disable-next-line
     Object.defineProperty(Array.prototype, 'findIndex', {
 
         value(predicate) {