# eslint
## .eslintrc.js 配置
```
{
"env": {
"browser": true,
"node": true,
"commonjs": 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
},
"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"],
// 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]+)+$"}]
"dot-notation": [2, {"allowKeywords": true}],
// 文件末尾强制换行
"eol-last": 2,
// 使用 === 替代 ==
"eqeqeq": [2, "allow-null"],
// 方法表达式是否需要命名
"func-names": 0,
// 方法定义风格，参数：
// declaration: 强制使用方法声明的方式，function f(){} e.g [2, "declaration"]
// expression：强制使用方法表达式的方式，var f = function() {} e.g [2, "expression"]
// allowArrowFunctions: declaration风格中允许箭头函数。 e.g [2, "declaration", { "allowArrowFunctions": true }]
"func-style": 0,
"generator-star-spacing": [2, { "before": true, "after": true }],
"guard-for-in": 0,
"handle-callback-err": [2, "^(err|error)$" ],
"indent": [2, 2, { "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": 2,
"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-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" }],
"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": 2,
"semi": [2, "never"],
"semi-spacing": 0,
"sort-vars": 0,
"space-after-keywords": [2, "always"],
"space-before-blocks": [2, "always"],
"space-before-function-paren": [2, "always"],
"space-in-parens": [2, "never"],
"space-infix-ops": 2,
"space-return-throw-case": 2,
"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"]
}
}
```
