.eslintrc

{
  env: {
    es6: true,
    node: true
  },
  extends: "eslint:recommended",
  parserOptions: {
    ecmaVersion: 6,
    sourceType: "module"
  },
  rules: {
    # Possible Errors
    no-console: "warn",
    no-template-curly-in-string: "warn",
    valid-jsdoc: "warn",

    # Best Practices
    curly: [ "warn", "multi-line" ],
    default-case: "warn",
    eqeqeq: [ "warn", "always" ],
    dot-location: [ "warn", "object" ],
    no-else-return: "error",
    no-extra-label: "error",
    no-floating-decimal: "error",
    no-lone-blocks: "error",
    no-multi-str: "error",
    no-new: "error",
    no-new-func: "error",
    no-return-assign: "error",
    no-useless-concat: "warn",
    no-useless-escape: "error",
    no-useless-return: "error",
    require-await: "error",
    yoda: [ "error", "never", { "onlyEquality": true } ],

    # NodeJS/CommonJS
    # handle-callback-err: ["error", "(e|E)rr"]
    no-new-require: "error",
    no-sync: "error",

    # Style
    array-bracket-spacing: [ "warn", "always" ],
    block-spacing: "warn",
    brace-style: [ "warn", "stroustrup", { "allowSingleLine": true } ],
    comma-dangle: [ "warn", "never" ],
    comma-spacing: "warn",
    comma-style: "warn",
    computed-property-spacing: "warn",
    eol-last: "warn",
    func-call-spacing: "warn",
    indent: [ "warn", 2, { SwitchCase: 1, MemberExpression: 1 } ],
    linebreak-style: [ "error", "unix" ],
    no-array-constructor: "error",
    no-multiple-empty-lines: "warn",
    no-new-object: "error",
    no-trailing-spaces: "warn",
    no-unneeded-ternary: "error",
    object-curly-spacing: ["warn", "always"],
    quotes: [ "warn", "single" ],
    require-jsdoc: [ "warn", { require: { FunctionDeclaration: true, MethodDefinition: true, ClassDeclaration: true, ArrowFunctionExpression: true } } ],
    semi: [ "error", "always" ],
    space-infix-ops: "warn",
    spaced-comment: ["error", "always"],

    # ES6
    arrow-spacing: "error",
    no-useless-computed-key: "error",
    no-useless-constructor: "error",
    no-useless-rename: "error",
    no-var: "error",
    prefer-template: "warn",
    rest-spread-spacing: "error",
    symbol-description: "error",
    template-curly-spacing: "error"
  }
}