.eslintrc

{
  "parser": "babel-eslint",
  "env": {
    "node": true,
    "es6": true,
    "browser": true
  },
  "rules": {
    # Possible errors
    comma-dangle: 2,
    no-console: 2,
    no-cond-assign: 2,
    no-control-regex: 2,
    no-debugger: 2,
    no-dupe-args: 2,
    no-dupe-keys: 2,
    no-duplicate-case: 2,
    no-empty: 2,
    no-empty-character-class: 2,
    no-ex-assign: 2,
    no-extra-boolean-cast: 2,
    no-extra-semi: 2,
    no-func-assign: 2,
    no-invalid-regexp: 2,
    no-irregular-whitespace: 2,
    no-negated-in-lhs: 2,
    no-obj-calls: 2,
    no-proto: 2,
    no-unexpected-multiline: 2,
    no-unreachable: 2,
    use-isnan: 2,
    valid-typeof: 2,
    valid-jsdoc: 2,
    # Best practices
    curly: [2, "multi"],
    eqeqeq: 2,
    no-fallthrough: 2,
    no-param-reassign: 2,
    no-octal: 2,
    no-redeclare: 2,
    # strict mode
    strict: [2, "global"],
    # variables
    no-delete-var: 2,
    no-undef: 2,
    no-unused-vars: 2,
    # node
    no-mixed-requires: 2,
    no-new-require: 2,
    # stylistic
    brace-style: 2,
    camelcase: 2,
    comma-style: 2,
    comma-spacing: 2,
    eol-last: 2,
    indent: [2, 2, {SwitchCase: 1}],
    keyword-spacing: 2,
    max-len: [2, 80, 2],
    max-depth: [2, 4],
    new-cap: 2,
    new-parens: 2,
    no-mixed-spaces-and-tabs: 2,
    no-multiple-empty-lines: [2, {max: 2}],
    no-trailing-spaces: 2,
    quotes: [2, "single"],
    semi: 2,
    space-before-blocks: [2, "always"],
    space-before-function-paren: [2, "never"],
    space-in-parens: [2, "never"],
    space-infix-ops: 2,
    space-unary-ops: 2,
    # es6
    arrow-parens: [2, "always"],
    arrow-spacing: [2, {"before": true, "after": true}],
    constructor-super: 2,
    no-class-assign: 2,
    no-confusing-arrow: 2,
    no-const-assign: 2,
    no-dupe-class-members: 2,
    no-this-before-super: 2,
    no-var: 2,
    prefer-const: 2,
    prefer-rest-params: 2,
    template-curly-spacing: 2
  }
}