.eslintrc

{
  "env": {
    "es6": true,
    "node": true,
    "mocha": true
  },
  "extends": [
    "eslint:recommended"
  ],
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module"
  },
  "globals": {
    "XMLSerializer": true,
    "Blob": true,
    "Image": true,
    "Promise": true,
    "XMLHttpRequest": true,
    "FileReader": true,
    "HTMLElement": true,
    "CanvasRenderingContext2D": true,
    "Worker": true,
    "URL": true
  },
  "plugins": [
    "promise",
    "import-order",
    "jsdoc"
  ],
  "rules": {
    "indent": 0,
    //    "prefer-const": "error",
    //    "no-var": "error",
    "prefer-arrow-callback": "error",
    "arrow-parens": 0,
    "strict": [
      // use strict mode
      "error",
      "global"
    ],
    "no-unused-vars": [
      "error",
      {
        "argsIgnorePattern": "^_"
      }
    ],
    "no-constant-condition": [
      "error"
    ],
    "no-multi-spaces": 0,
    "semi": [
      // semicolons are required
      "error",
      "always"
    ],
    "max-len": [
      // max line length is 120 chars (except for comments)
      "error",
      120,
      {
        "ignoreComments": true
      }
    ],
    "eol-last": [
      // \n is required at the end of the file
      "error",
      "always"
    ],
    "camelcase": [
      // enforce camelcase style for variable names and property names
      "error",
      {
        "properties": "always"
      }
    ],
    "dot-notation": [
      // always use the dot notation to access properties, except if property contains '_'
      "error",
      {
        "allowPattern": "^.*_.*$"
      }
    ],
    "quotes": [
      // use single quotes (or backticks if there is a substitution)
      "error",
      "single"
    ],
    "comma-dangle": [
      // no trailing commas in object or array literals
      "error",
      "never"
    ],
    "no-multi-str": [
      // no multi line strings using \
      "error"
    ],
    "no-multiple-empty-lines": [
      "error"
    ],
    "no-trailing-spaces": [
      "error"
    ],
    "no-mixed-spaces-and-tabs": [
      "error"
    ],
    "curly": 0,
    "brace-style": 0,
    "keyword-spacing": [
      // in `} else {` both spaces are required (in general, around keywords)
      "error",
      {
        "before": true,
        "after": true,
        "overrides": {
          "catch": {
            "before": true,
            "after": false
          }
        }
      }
    ],
    "space-before-blocks": [
      // in `if (foo) {` the second space is required
      "error",
      "always"
    ],
    "arrow-spacing": [
      // in `(foo) => {` both spaces are required
      "error",
      {
        "before": true,
        "after": true
      }
    ],
    "operator-linebreak": [
      // linebreak goes after the operator except for '?' and ':'
      "error",
      "after",
      {
        "overrides": {
          "?": "before",
          ":": "before"
        }
      }
    ],
    "space-unary-ops": [
      // space is required for new, delete, etc. but not for +, -, ++, --, etc.
      "error",
      {
        "words": true,
        "nonwords": false,
        "overrides": {
          "typeof": false
          // also no space for typeof(...)
        }
      }
    ],
    "space-infix-ops": [
      // space is required around infix operators, e.g: 'a + b'
      "error"
    ],
    "comma-spacing": [
      // space is required after a comma
      "error",
      {
        "after": true
      }
    ],
    "array-bracket-spacing": 0,
    "space-in-parens": [
      // '( x + y )' is not allowed, use '(x + y)'
      "error",
      "never"
    ],
    "key-spacing": 0,
    "yoda": [
      // disallow yoda conditions, e.g. `(true === foo)`
      "error",
      "never"
    ],
    "no-with": [
      // the with statements is not allowed
      "error"
    ],
    "linebreak-style": [
      // use unix linebreak '\n'
      "error",
      "unix"
    ],
    "wrap-iife": [
      // require IIFE to be wrapped in parenthesis
      "error"
    ],
    "func-call-spacing": [
      // no space between the function name and the opening parenthesis on invocation
      "error",
      "never"
    ],
    "space-before-function-paren": 0,
    "no-cond-assign": [
      // no assignment operators in if, for and while except if enclosed in parentheses
      "error",
      "except-parens"
    ],
    "no-inner-declarations": [
      "error"
    ],
    "no-console": 2,
    // `console.log(...)` is allowed
    "import-order/import-order": 0,
    // import order is not enfored
    "no-case-declarations": 0
  }
}