.eslintrc.json

{
  "root": true,
  "extends": "eslint:recommended",
  "parserOptions": {
    "ecmaVersion": 5,
    "ecmaFeatures": {
      "globalReturn": true,
      "impliedStrict": true
    }
  },
  "env": {
    "es6": true,
    "browser": true,
    "node": true,
    "shared-node-browser": true,
    "worker": true,
    "mocha": true
  },
  "ignorePatterns": [
    "encoding.js",
    "encoding.min.js"
  ],
  "rules": {
    "comma-dangle": ["error", "never"],
    "indent": [
      "error", 2, {
        "ArrayExpression": 1,
        "ignoreComments": true,
        "ignoredNodes": ["ConditionalExpression"],
        "MemberExpression": 1,
        "ObjectExpression": 1,
        "outerIIFEBody": "off",
        "SwitchCase": 1,
        "VariableDeclarator": "first"
      }
    ],
    "key-spacing": [
      "error", {
        "beforeColon": false,
        "afterColon": true
      }
    ],
    "keyword-spacing": "error",
    "max-len": [
      "error", {
        "code": 120,
        "tabWidth": 2,
        "ignoreUrls": true,
        "ignoreStrings": true,
        "ignoreTemplateLiterals": true,
        "ignoreRegExpLiterals": true
      }
    ],
    "no-empty": "off",
    "no-mixed-spaces-and-tabs": "error",
    "no-multiple-empty-lines": ["error", { "max": 2 }],
    "no-unused-vars": ["error", { "args": "none" }],
    "no-tabs": "error",
    "no-useless-escape": "warn",
    "no-console": "warn",
    "no-undef": "error",
    "object-curly-spacing": ["error", "always", { "objectsInObjects": false }],
    "quotes": ["error", "single", { "allowTemplateLiterals": true, "avoidEscape": true }],
    "quote-props": ["error", "consistent-as-needed", { "keywords": true }],
    "semi": "error",
    "space-infix-ops": "error",
    "space-unary-ops": "error"
  }
}