.eslintrc

{
  "env": {
    "browser": true,
    "node": true,
    "es6": true,
    "mocha": true
  },
  "rules": {
    // standard defaults
    "no-alert": 2,
    "no-array-constructor": 2,
    "no-caller": 2,
    "no-catch-shadow": 2,
    "no-eval": 2,
    "no-extend-native": 2,
    "no-extra-bind": 2,
    "no-implied-eval": 2,
    "no-iterator": 2,
    "no-label-var": 2,
    "no-labels": 2,
    "no-lone-blocks": 2,
    "no-loop-func": 2,
    "no-multi-spaces": 2,
    "no-multi-str": 2,
    "no-native-reassign": 2,
    "no-new": 2,
    "no-new-func": 2,
    "no-new-object": 2,
    "no-new-wrappers": 2,
    "no-octal-escape": 2,
    "no-process-exit": 2,
    "no-proto": 2,
    "no-return-assign": 2,
    "no-script-url": 2,
    "no-sequences": 2,
    "no-shadow-restricted-names": 2,
    "no-spaced-func": 2,
    "no-trailing-spaces": 2,
    "no-undef-init": 2,
    "no-unused-expressions": 2,
    "no-with": 2,
    "comma-spacing": 2,
    "dot-notation": 2,
    "eol-last": 2,
    "key-spacing": 2,
    "new-cap": 2,
    "semi-spacing": 2,
    "space-infix-ops": 2,
    "space-unary-ops": 2,
    "yoda": 2,

    // relaxed restrictions
    "no-mixed-requires": 0,
    "no-underscore-dangle": 0,
    "no-shadow": 0,
    "no-use-before-define": [2, "nofunc"],
    "camelcase": [2, {"properties": "never"}],
    "curly": 0,
    // "curly": [2, "multi"],
    // "curly": [2, "multi-line"],
    "eqeqeq": 0,
    // "eqeqeq": [2, "smart"],
    "new-parens": 0,
    "quotes": [2, "single", "avoid-escape"],
    "semi": [2, "never"],
    "strict": 0,
    "consistent-return": 0,

    // extra restrictions
    "no-empty-character-class": 2,
    "no-extra-parens": [2, "functions"],
    "no-floating-decimal": 2,
    "no-lonely-if": 2,
    "no-self-compare": 2,
    "no-throw-literal": 2,

    // style
    "array-bracket-spacing": [2, "never"],
    "brace-style": [2, "1tbs", {"allowSingleLine": true}],
    "comma-dangle": [2, "always-multiline"],
    "comma-style": [2, "last"],
    "consistent-this": [2, "self"],
    // "indent": [2, 2],
    "object-curly-spacing": [2, "never"],
    "operator-assignment": [2, "always"],
    "operator-linebreak": [2, "after"],
    "keyword-spacing": [2, {"after": true}],
    "space-before-blocks": [2, "always"],
    "space-before-function-paren": [2, "never"],
    "space-in-parens": [2, "never"],
    "spaced-comment": [2, "always"]
  }
}