.eslintrc.js

module.exports = {
    "env": {
        "browser": true,
        "node": true,
        "commonjs": true,
        "es6": true
    },
    "ecmaFeatures": {
        // lambda表达式
        "arrowFunctions": true,
        // 解构赋值
        "destructuring": true,
        // class
        "classes": true,
        // http://es6.ruanyifeng.com/#docs/function#函数参数的默认值
        "defaultParams": true,
        // 块级作用域，允许使用let const
        "blockBindings": true,
        // 允许使用模块，模块内默认严格模式
        "modules": true,
        // 允许字面量定义对象时，用表达式做属性名
        // http://es6.ruanyifeng.com/#docs/object#属性名表达式
        "objectLiteralComputedProperties": true,
        // 允许对象字面量方法名简写
        /*var o = {
            method() {
              return "Hello!";
            }
         };

         等同于

         var o = {
           method: function() {
             return "Hello!";
           }
         };
        */
        "objectLiteralShorthandMethods": true,
        /*
          对象字面量属性名简写
          var foo = 'bar';
          var baz = {foo};
          baz // {foo: "bar"}

          // 等同于
          var baz = {foo: foo};
        */
        "objectLiteralShorthandProperties": true,
        // http://es6.ruanyifeng.com/#docs/function#rest参数
        "restParams": true,
        // http://es6.ruanyifeng.com/#docs/function#扩展运算符
        "spread": true,
        // http://es6.ruanyifeng.com/#docs/iterator#for---of循环
        "forOf": true,
        // http://es6.ruanyifeng.com/#docs/generator
        "generators": true,
        // http://es6.ruanyifeng.com/#docs/string#模板字符串
        "templateStrings": true,
        "superInFunctions": true,
        // http://es6.ruanyifeng.com/#docs/object#对象的扩展运算符
        "experimentalObjectRestSpread": true,   //es6
    },
    "parserOptions": {
        "ecmaVersion": 6,       //es6写法
    },
    "parser": "babel-eslint",
    "rules": {
        // 定义对象的set存取器属性时，强制定义get
        "accessor-pairs": 2,
        // 指定数组的元素之间要以空格隔开(,后面)， never参数：[ 之前和 ] 之后不能带空格，always参数：[ 之前和 ] 之后必须带空格
        "array-bracket-spacing": [2, "never"],
        // 在块级作用域外访问块内定义的变量是否报错提示
        "block-scoped-var": 0,
        // if while function 后面的{必须与if在同一行，java风格。
        "brace-style": [2, "1tbs", {"allowSingleLine": true}],
        // 双峰驼命名格式
        "camelcase": 2,
        // 数组和对象键值对最后一个逗号， never参数：不能带末尾的逗号, always参数：必须带末尾的逗号，
        // always-multiline：多行模式必须带逗号，单行模式不能带逗号
        // "comma-dangle": [2, "never"],
        "comma-dangle": [0, "never"],
        // 控制逗号前后的空格
        "comma-spacing": [2, {"before": false, "after": true}],
        // 控制逗号在行尾出现还是在行首出现
        // http://eslint.org/docs/rules/comma-style
        "comma-style": [2, "last"],
        // 圈复杂度
        "complexity": [2, 9],
        // 以方括号取对象属性时，[ 后面和 ] 前面是否需要空格, 可选参数 never, always
        "computed-property-spacing": [2, "never"],
        // 强制方法必须返回值，TypeScript强类型，不配置
        "consistent-return": 0,
        // 用于指统一在回调函数中指向this的变量名，箭头函数中的this已经可以指向外层调用者，应该没卵用了
        // e.g [0,"that"] 指定只能 var that = this. that不能指向其他任何值，this也不能赋值给that以外的其他值
        "consistent-this": 0,
        // 强制在子类构造函数中用super()调用父类构造函数，TypeScrip的编译器也会提示
        "constructor-super": 0,
        // if else while for do后面的代码块是否需要{ }包围，参数：
        //    multi  只有块中有多行语句时才需要{ }包围
        //    multi-line  只有块中有多行语句时才需要{ }包围, 但是块中的执行语句只有一行时，
        //                   块中的语句只能跟和if语句在同一行。if (foo) foo++; else doSomething();
        //    multi-or-nest 只有块中有多行语句时才需要{ }包围, 如果块中的执行语句只有一行，执行语句可以零另起一行也可以跟在if语句后面
        //    [2, "multi", "consistent"] 保持前后语句的{ }一致
        //    default: [2, "all"] 全都需要{ }包围
        "curly": [2, "all"],
        // switch语句强制default分支，也可添加 // no default 注释取消此次警告
        "default-case": 2,
        // 强制object.key 中 . 的位置，参数:
        //      property，'.'号应与属性在同一行
        //      object, '.' 号应与对象名在同一行
        "dot-location": [2, "property"],
        // 强制使用.号取属性
        //    参数： allowKeywords：true 使用保留字做属性名时，只能使用.方式取属性
        //                          false 使用保留字做属性名时, 只能使用[]方式取属性 e.g [2, {"allowKeywords": false}]
        //           allowPattern:  当属性名匹配提供的正则表达式时，允许使用[]方式取值,否则只能用.号取值 e.g [2, {"allowPattern": "^[a-z]+(_[a-z]+)+$"}]
        "dot-notation": [2, {"allowKeywords": true}],
        // 文件末尾强制换行
        "eol-last": 0,
        // 使用 === 替代 ==
        "eqeqeq": [0, "allow-null"],
        // 方法表达式是否需要命名
        "func-names": 0,
        // 方法定义风格，参数：
        //    declaration: 强制使用方法声明的方式，function f(){} e.g [2, "declaration"]
        //    expression：强制使用方法表达式的方式，var f = function() {}  e.g [2, "expression"]
        //    allowArrowFunctions: declaration风格中允许箭头函数。 e.g [2, "declaration", { "allowArrowFunctions": true }]
        "func-style": 0,
        "generator-star-spacing": [2, {"before": true, "after": true}],
        "guard-for-in": 0,
        "handle-callback-err": [2, "^(err|error)$"],
        "indent": [2, 4, {"SwitchCase": 1}],
        "key-spacing": [2, {"beforeColon": false, "afterColon": true}],
        "linebreak-style": 0,
        "lines-around-comment": 0,
        "max-nested-callbacks": 0,
        "new-cap": [2, {"newIsCap": true, "capIsNew": false}],
        "new-parens": 2,
        "newline-after-var": 0,
        "no-alert": 0,
        "no-array-constructor": 2,
        "no-caller": 2,
        "no-catch-shadow": 0,
        "no-cond-assign": 2,
        "no-console": 0,
        "no-constant-condition": 0,
        "no-continue": 0,
        "no-control-regex": 2,
        "no-debugger": 2,
        "no-delete-var": 2,
        "no-div-regex": 0,
        "no-dupe-args": 2,
        "no-dupe-keys": 2,
        "no-duplicate-case": 2,
        "no-else-return": 0,
        "no-empty": 0,
        "no-empty-character-class": 2,
        "no-empty-label": 0,  //禁止使用空label
        "no-eq-null": 0,
        "no-eval": 2,
        "no-ex-assign": 2,
        "no-extend-native": 2,
        "no-extra-bind": 2,
        "no-extra-boolean-cast": 2,
        "no-extra-parens": 0,
        "no-extra-semi": 0,
        "no-fallthrough": 2,
        "no-floating-decimal": 2,
        "no-func-assign": 2,
        "no-implied-eval": 2,
        "no-inline-comments": 0,
        "no-inner-declarations": [2, "functions"],
        "no-invalid-regexp": 2,
        "no-irregular-whitespace": 2,
        "no-iterator": 2,
        "no-label-var": 2,
        "no-labels": 2,
        "no-lone-blocks": 2,
        "no-lonely-if": 0,
        "no-loop-func": 0,
        "no-mixed-requires": 0,
        "no-mixed-spaces-and-tabs": 2,
        "no-multi-spaces": 2,
        "no-multi-str": 2,
        "no-multiple-empty-lines": [2, {"max": 1}],
        "no-native-reassign": 2,
        "no-negated-in-lhs": 2,
        "no-nested-ternary": 0,
        "no-new": 2,
        "no-new-func": 0,
        "no-new-object": 2,
        "no-new-require": 2,
        "no-new-wrappers": 2,
        "no-obj-calls": 2,
        "no-octal": 2,
        "no-octal-escape": 2,
        "no-param-reassign": 0,
        "no-path-concat": 0,
        "no-process-env": 0,
        "no-process-exit": 0,
        "no-proto": 0,
        "no-redeclare": 2,
        "no-regex-spaces": 2,
        "no-restricted-modules": 0,
        "no-return-assign": 2,
        "no-script-url": 0,
        "no-self-compare": 2,
        "no-sequences": 2,
        "no-shadow": 0,
        "no-shadow-restricted-names": 2,
        "no-spaced-func": 2,
        "no-sparse-arrays": 2,
        "no-sync": 0,
        "no-ternary": 0,
        "no-this-before-super": 2,
        "no-throw-literal": 2,
        "no-trailing-spaces": 2,
        "no-undef": 2,
        "no-undef-init": 2,
        "no-undefined": 0,
        "no-underscore-dangle": 0,
        "no-unexpected-multiline": 2,
        "no-unneeded-ternary": 2,
        "no-unreachable": 2,
        "no-unused-expressions": 0,
        // "no-unused-vars": [2, {"vars": "all", "args": "none"}],
        "no-unused-vars": [0, {"vars": "all", "args": "after-used"}],// 不能有声明后未被使用的变量或参数
        "no-use-before-define": 0,
        "no-var": 0,
        "no-void": 0,
        "no-warning-comments": 0,
        "no-with": 2,
        "object-curly-spacing": 0,
        "object-shorthand": 0,
        // "one-var": [2, {"initialized": "never"}],
        "one-var": 1, // 连续声明
        "operator-assignment": 0,
        "operator-linebreak": [2, "after", {"overrides": {"?": "before", ":": "before"}}],
        "padded-blocks": 0,
        "prefer-const": 0,
        "quote-props": 0,
        "quotes": [2, "single", "avoid-escape"],
        "radix": 0, // parseInt必须指定第二个参数
        // "semi": ["error", "always"],
        "semi": [
            "error",
            "always"
        ],
        "semi-spacing": 0,
        "sort-vars": 0,
        "space-after-keywords": [0, "always", "never"],
        "space-before-blocks": [2, "always"],
        "space-before-function-paren": [2, "never"],
        "space-in-parens": [2, "never"],
        "space-infix-ops": 2,
        "space-return-throw-case": 0,  // return throw case后面要不要加空格
        "space-unary-ops": [2, {"words": true, "nonwords": false}],
        "spaced-comment": [2, "always", {"markers": ["global", "globals", "eslint", "eslint-disable", "*package", "!"]}],
        "strict": 0,
        "use-isnan": 2,
        "valid-jsdoc": 0,
        "valid-typeof": 2,
        "vars-on-top": 0,
        "wrap-iife": [2, "any"],
        "wrap-regex": 0,
        "yoda": [2, "never"]
    },

    // 是规避制表符和空格混用的情况 以及定义一些可全局的变量不必声明的
    // "globals": {
    //     "document": true,
    //     "localStorage": true,
    //     "window": true,
    //     "get": true,
    //     "insert": true,
    // },
};