.eslintrc

{
  "env": {
    "browser": true,
    "node": true,
    "es6": true,
    "mocha": true
  },
  "extends": [
    "eslint:recommended"
  ],
  "parserOptions": {
    "sourceType": "module",
    "ecmaFeatures": {
      "modules": true,
      "experimentalObjectRestSpread": true
    },
    "ecmaVersion": 2017
  },
  "rules": {
    "array-bracket-spacing": 2,
    "arrow-parens": 2,
    "arrow-spacing": 2,
    "brace-style": 2,
    "block-spacing": 2,
    "comma-spacing": 2,
    "comma-style": 2,
    "computed-property-spacing": 2,
    "curly": [2, "all"],
    "eqeqeq": 2,
    "func-call-spacing": 2,
    "indent": ["error", 2, { "SwitchCase": 1 }],
    "key-spacing": 2,
    "keyword-spacing": 2,
    "max-statements-per-line": 2,
    "newline-after-var": 2,
    "newline-before-return": 2,
    "no-alert": 2,
    "no-array-constructor": 2,
    "no-mixed-spaces-and-tabs": 2,
    "no-multi-spaces": ["error", {
      "exceptions": {
        "VariableDeclarator": true
      }
    }],
    "no-multiple-empty-lines": ["error", { "max": 1 }],
    "no-new-object": 2,
    "no-return-assign": 2,
    "no-unneeded-ternary": 2,
    "no-unused-vars": 1,
    "no-var": 1,
    "no-whitespace-before-property": 2,
    "object-curly-spacing": [2, "always"],
    "object-shorthand": [2, "always"],
    "one-var": [2, "never"],
    "padded-blocks": ["error", {
      "blocks": "never",
      "classes": "never",
      "switches": "never"
    }],
    "prefer-arrow-callback": 1,
    "prefer-const": 2,
    "prefer-spread": 1,
    "prefer-template": 2,
    "quote-props": [2, "as-needed"],
    "quotes": [2, "single"],
    "semi": 2,
    "space-before-blocks": 2,
    "space-before-function-paren": 2,
    "space-in-parens": 2,
    "space-infix-ops": 2,
    "space-unary-ops": 2,
    "spaced-comment": 2
  }
}