eslint

一、项目使用lint汇总

项目	构建方式	风格	自定义rules
MBF4	vue-cli	plugin:vue/essential	'no-console'， 'no-debugger'
MBInfoManage	vue-cli .editorconfig	plugin:vue/essential	'no-console'， 'no-debugger' [*]indent_style = space, indent_size=2 [*.{cs,csx}] indent_size = 4 , charset = utf-8-bom
MBInfoMobileManage-web	vue-cli .editorconfig	plugin:vue/essential, eslint:recommended	'no-console'， 'no-debugger', semi:['warn','never''], quotes:['warn','single''], 'no-unused-vars':'warn', no-empty:'off', 'no-useless-escape':'off' [*]indent_style = space, indent_size=2
MBPGCManage	gulp .editorconfig	standard	eslint().eslint.format() "indent",'kubebreaj-syle','quotes','semi','no-tabs','no-unused-vars','no-eval' [*]indent_style = space, [*.{cs,csx}] indent_size = 4 , charset = utf-8-bom

二、vue-cli 默认的 lint ——

"eslintConfig": { "root": true, "env": { "node": true }, "extends": [ "plugin:vue/essential", "eslint:recommended" ], "rules": {}, "parserOptions": { "parser": "babel-eslint" } }

A——eslint:recommended cn.eslint.org/docs/rules/

eslint:recommended 全部的规则默认都是禁用的。在 配置文件中，使用 "extends": "eslint:recommended" 来启用推荐的规则，

报告一些常见的问题，在下文中这些推荐的规则都带有一个✅标记。

命令行的 --fix 选项用来自动修复规则所报告的问题（目前，大部分是对空白的修复），在下文中会有一个 🔧 的图标。

B——plugin:vue/essential github.com/vuejs/eslin… eslint.vuejs.org/ eslint.vuejs.org/rules/

//base.js /* * IMPORTANT! * This file has been automatically generated, * in order to update it's content execute "npm run update" */ module.exports = { parser: require.resolve('vue-eslint-parser'), parserOptions: { ecmaVersion: 2018, sourceType: 'module', ecmaFeatures: { jsx: true } }, env: { browser: true, es6: true }, plugins: [ 'vue' ], rules: { 'vue/comment-directive': 'error', 'vue/jsx-uses-vars': 'error' } }

//essential.js module.exports = { extends: require.resolve('./base'), rules: { 'vue/no-async-in-computed-properties': 'error', 'vue/no-dupe-keys': 'error', 'vue/no-duplicate-attributes': 'error', 'vue/no-parsing-error': 'error', 'vue/no-reserved-keys': 'error', 'vue/no-shared-component-data': 'error', 'vue/no-side-effects-in-computed-properties': 'error', 'vue/no-template-key': 'error', 'vue/no-textarea-mustache': 'error', 'vue/no-unused-components': 'error', 'vue/no-unused-vars': 'error', 'vue/no-use-v-if-with-v-for': 'error', 'vue/require-component-is': 'error', 'vue/require-prop-type-constructor': 'error', 'vue/require-render-return': 'error', 'vue/require-v-for-key': 'error', 'vue/require-valid-default-prop': 'error', 'vue/return-in-computed-property': 'error', 'vue/use-v-on-exact': 'error', 'vue/valid-template-root': 'error', 'vue/valid-v-bind': 'error', 'vue/valid-v-cloak': 'error', 'vue/valid-v-else-if': 'error', 'vue/valid-v-else': 'error', 'vue/valid-v-for': 'error', 'vue/valid-v-html': 'error', 'vue/valid-v-if': 'error', 'vue/valid-v-model': 'error', 'vue/valid-v-on': 'error', 'vue/valid-v-once': 'error', 'vue/valid-v-pre': 'error', 'vue/valid-v-show': 'error', 'vue/valid-v-text': 'error' } }

三、 eslint-config-standard github.com/standard/es…

{ "parserOptions": { "ecmaVersion": 2018, "ecmaFeatures": { "jsx": true }, "sourceType": "module" }, "env": { "es6": true, "node": true }, "plugins": [ "import", "node", "promise", "standard" ], "globals": { "document": false, "navigator": false, "window": false }, "rules": { "accessor-pairs": "error", "arrow-spacing": ["error", { "before": true, "after": true }], "block-spacing": ["error", "always"], "brace-style": ["error", "1tbs", { "allowSingleLine": true }], "camelcase": ["error", { "properties": "never" }], "comma-dangle": ["error", { "arrays": "never", "objects": "never", "imports": "never", "exports": "never", "functions": "never" }], "comma-spacing": ["error", { "before": false, "after": true }], "comma-style": ["error", "last"], "constructor-super": "error", "curly": ["error", "multi-line"], "dot-location": ["error", "property"], "eol-last": "error", "eqeqeq": ["error", "always", { "null": "ignore" }], "func-call-spacing": ["error", "never"], "generator-star-spacing": ["error", { "before": true, "after": true }], "handle-callback-err": ["error", "^(err|error)$" ], "indent": ["error", 2, { "SwitchCase": 1, "VariableDeclarator": 1, "outerIIFEBody": 1, "MemberExpression": 1, "FunctionDeclaration": { "parameters": 1, "body": 1 }, "FunctionExpression": { "parameters": 1, "body": 1 }, "CallExpression": { "arguments": 1 }, "ArrayExpression": 1, "ObjectExpression": 1, "ImportDeclaration": 1, "flatTernaryExpressions": false, "ignoreComments": false }], "key-spacing": ["error", { "beforeColon": false, "afterColon": true }], "keyword-spacing": ["error", { "before": true, "after": true }], "new-cap": ["error", { "newIsCap": true, "capIsNew": false }], "new-parens": "error", "no-array-constructor": "error", "no-caller": "error", "no-class-assign": "error", "no-compare-neg-zero": "error", "no-cond-assign": "error", "no-const-assign": "error", "no-constant-condition": ["error", { "checkLoops": false }], "no-control-regex": "error", "no-debugger": "error", "no-delete-var": "error", "no-dupe-args": "error", "no-dupe-class-members": "error", "no-dupe-keys": "error", "no-duplicate-case": "error", "no-empty-character-class": "error", "no-empty-pattern": "error", "no-eval": "error", "no-ex-assign": "error", "no-extend-native": "error", "no-extra-bind": "error", "no-extra-boolean-cast": "error", "no-extra-parens": ["error", "functions"], "no-fallthrough": "error", "no-floating-decimal": "error", "no-func-assign": "error", "no-global-assign": "error", "no-implied-eval": "error", "no-inner-declarations": ["error", "functions"], "no-invalid-regexp": "error", "no-irregular-whitespace": "error", "no-iterator": "error", "no-label-var": "error", "no-labels": ["error", { "allowLoop": false, "allowSwitch": false }], "no-lone-blocks": "error", "no-mixed-operators": ["error", { "groups": [ ["==", "!=", "===", "!==", ">", ">=", "<", "<="], ["&&", "||"], ["in", "instanceof"] ], "allowSamePrecedence": true }], "no-mixed-spaces-and-tabs": "error", "no-multi-spaces": "error", "no-multi-str": "error", "no-multiple-empty-lines": ["error", { "max": 1, "maxEOF": 0 }], "no-negated-in-lhs": "error", "no-new": "error", "no-new-func": "error", "no-new-object": "error", "no-new-require": "error", "no-new-symbol": "error", "no-new-wrappers": "error", "no-obj-calls": "error", "no-octal": "error", "no-octal-escape": "error", "no-path-concat": "error", "no-proto": "error", "no-redeclare": "error", "no-regex-spaces": "error", "no-return-assign": ["error", "except-parens"], "no-return-await": "error", "no-self-assign": "error", "no-self-compare": "error", "no-sequences": "error", "no-shadow-restricted-names": "error", "no-sparse-arrays": "error", "no-tabs": "error", "no-template-curly-in-string": "error", "no-this-before-super": "error", "no-throw-literal": "error", "no-trailing-spaces": "error", "no-undef": "error", "no-undef-init": "error", "no-unexpected-multiline": "error", "no-unmodified-loop-condition": "error", "no-unneeded-ternary": ["error", { "defaultAssignment": false }], "no-unreachable": "error", "no-unsafe-finally": "error", "no-unsafe-negation": "error", "no-unused-expressions": ["error", { "allowShortCircuit": true, "allowTernary": true, "allowTaggedTemplates": true }], "no-unused-vars": ["error", { "vars": "all", "args": "none", "ignoreRestSiblings": true }], "no-use-before-define": ["error", { "functions": false, "classes": false, "variables": false }], "no-useless-call": "error", "no-useless-computed-key": "error", "no-useless-constructor": "error", "no-useless-escape": "error", "no-useless-rename": "error", "no-useless-return": "error", "no-whitespace-before-property": "error", "no-with": "error", "object-curly-spacing": ["error", "always"], "object-property-newline": ["error", { "allowMultiplePropertiesPerLine": true }], "one-var": ["error", { "initialized": "never" }], "operator-linebreak": ["error", "after", { "overrides": { "?": "before", ":": "before" } }], "padded-blocks": ["error", { "blocks": "never", "switches": "never", "classes": "never" }], "prefer-promise-reject-errors": "error", "quotes": ["error", "single", { "avoidEscape": true, "allowTemplateLiterals": true }], "rest-spread-spacing": ["error", "never"], "semi": ["error", "never"], "semi-spacing": ["error", { "before": false, "after": true }], "space-before-blocks": ["error", "always"], "space-before-function-paren": ["error", "always"], "space-in-parens": ["error", "never"], "space-infix-ops": "error", "space-unary-ops": ["error", { "words": true, "nonwords": false }], "spaced-comment": ["error", "always", { "line": { "markers": ["*package", "!", "/", ",", "="] }, "block": { "balanced": true, "markers": ["*package", "!", ",", ":", "::", "flow-include"], "exceptions": ["*"] } }], "symbol-description": "error", "template-curly-spacing": ["error", "never"], "template-tag-spacing": ["error", "never"], "unicode-bom": ["error", "never"], "use-isnan": "error", "valid-typeof": ["error", { "requireStringLiterals": true }], "wrap-iife": ["error", "any", { "functionPrototypeMethods": true }], "yield-star-spacing": ["error", "both"], "yoda": ["error", "never"], "import/export": "error", "import/first": "error", "import/no-duplicates": "error", "import/no-named-default": "error", "import/no-webpack-loader-syntax": "error", "node/no-deprecated-api": "error", "node/process-exit-as-throw": "error", "promise/param-names": "error", "standard/array-bracket-even-spacing": ["error", "either"], "standard/computed-property-even-spacing": ["error", "even"], "standard/no-callback-literal": "error", "standard/object-curly-even-spacing": ["error", "either"] } }

四、编辑器格式化 .editorconfig editorconfig.org

# EditorConfig is awesome: https://EditorConfig.org # top-most EditorConfig file root = true # Unix-style newlines with a newline ending every file [*] end_of_line = lf insert_final_newline = true # Matches multiple files with brace expansion notation # Set default charset [*.{js,py}] charset = utf-8 # 4 space indentation [*.py] indent_style = space indent_size = 4 # Tab indentation (no size specified) [Makefile] indent_style = tab # Indentation override for all JS under lib directory [lib/**.js] indent_style = space indent_size = 2 # Matches the exact files either package.json or .travis.yml [{package.json,.travis.yml}] indent_style = space indent_size = 2

五、gulp-eslint 的做用

const {src, task} = require('gulp'); const eslint = require('gulp-eslint'); task('default', () => { return src(['scripts/*.js']) // eslint() attaches the lint output to the "eslint" property // of the file object so it can be used by other modules. .pipe(eslint()) // eslint.format() outputs the lint results to the console. // Alternatively use eslint.formatEach() (see Docs). .pipe(eslint.format()) // To have the process exit with an error code (1) on // lint error, return the stream and pipe to failAfterError last. .pipe(eslint.failAfterError()); });

A-若是没有.eslintrc ，也没有在 package.json中配置规则，也没有行内代码，则默认的——没有启动任何校验规则

B-eslint.format(),用于定义输出的错误信息提示格式，默认格式为eslint stylish formatter github.com/sindresorhu…

checkstyle

• codeframe
• compact
• html
• jslint-xml
• json
• junit
• stylish
• table
• tap
• unix
• visualstudio
• C-为了让你对规则有个更好的理解，ESLint 对其进行了分门别类。全部的规则默认都是禁用的。TODO--校验

五、经过插件进行格式化代码JavaScript Standard Style standardjs.com/readme-zhcn…

JavaScript 代码规范，自带 linter & 代码自动修正

本工具经过如下三种方式为你（及你的团队）节省大量时间：

• 无须配置。 史上最便捷的统一代码风格的方式，轻松拥有。
• 自动代码格式化。 只需运行 standard --fix 今后和脏乱差的代码说再见。
• 提早发现风格及程序问题。 减小代码审查过程当中反反复复的修改过程，节约时间。

无须犹豫。不再用维护 .eslintrc, .jshintrc, or .jscsrc 。开箱即用。

npm install standard --save-dev

添加配置到 package.json

{ "name": "my-cool-package", "devDependencies": { "standard": "*" }, "scripts": { "test": "standard && node my-tests.js" } }

六、如何使用lint

A、在保存代码时启用lint

module: { rules: [ { enforce: 'pre', test: /\.(js|vue)$/, loader: 'eslint-loader', include: [path.resolve(__dirname, '../src')], // 指定检查的目录 exclude: /node_modules/, options:{ fix: true } }, ] },

B、在commit代码时启用

npm install pre-commit --save-dev

修改package.json

"scripts": { "dev": "webpack-dev-server --config ./build/webpack.dev.js --colors", "nodemon": "nodemon --config nodemon", "build": "webpack --config ./build/webpack.build.js", "lint": "eslint src --ext .js --cache --fix" }, "pre-commit": [ "lint" ],

C、防止使用了es6的es5的代码

　　

备注：

一、eslint 配置项

root 限定配置文件的使用范围

parser 指定eslint的解析器

parserOptions 设置解析器选项

extends 指定eslint规范

plugins 引用第三方的插件

env 指定代码运行的宿主环境

rules 启用额外的规则或覆盖默认的规则

globals 声明在代码中的自定义全局变量

二、rules说明

"no-alert": 0,//禁止使用alert confirm prompt "no-array-constructor": 2,//禁止使用数组构造器 "no-bitwise": 0,//禁止使用按位运算符 "no-caller": 1,//禁止使用arguments.caller或arguments.callee "no-catch-shadow": 2,//禁止catch子句参数与外部做用域变量同名 "no-class-assign": 2,//禁止给类赋值 "no-cond-assign": 2,//禁止在条件表达式中使用赋值语句 "no-console": 2,//禁止使用console "no-const-assign": 2,//禁止修改const声明的变量 "no-constant-condition": 2,//禁止在条件中使用常量表达式 if(true) if(1) "no-continue": 0,//禁止使用continue "no-control-regex": 2,//禁止在正则表达式中使用控制字符 "no-debugger": 2,//禁止使用debugger "no-delete-var": 2,//不能对var声明的变量使用delete操做符 "no-div-regex": 1,//不能使用看起来像除法的正则表达式/=foo/ "no-dupe-keys": 2,//在建立对象字面量时不容许键重复 {a:1,a:1} "no-dupe-args": 2,//函数参数不能重复 "no-duplicate-case": 2,//switch中的case标签不能重复 "no-else-return": 2,//若是if语句里面有return,后面不能跟else语句 "no-empty": 2,//块语句中的内容不能为空 "no-empty-character-class": 2,//正则表达式中的[]内容不能为空 "no-empty-label": 2,//禁止使用空label "no-eq-null": 2,//禁止对null使用==或!=运算符 "no-eval": 1,//禁止使用eval "no-ex-assign": 2,//禁止给catch语句中的异常参数赋值 "no-extend-native": 2,//禁止扩展native对象 "no-extra-bind": 2,//禁止没必要要的函数绑定 "no-extra-boolean-cast": 2,//禁止没必要要的bool转换 "no-extra-parens": 2,//禁止非必要的括号 "no-extra-semi": 2,//禁止多余的冒号 "no-fallthrough": 1,//禁止switch穿透 "no-floating-decimal": 2,//禁止省略浮点数中的0 .5 3. "no-func-assign": 2,//禁止重复的函数声明 "no-implicit-coercion": 1,//禁止隐式转换 "no-implied-eval": 2,//禁止使用隐式eval "no-inline-comments": 0,//禁止行内备注 "no-inner-declarations": [2, "functions"],//禁止在块语句中使用声明（变量或函数） "no-invalid-regexp": 2,//禁止无效的正则表达式 "no-invalid-this": 2,//禁止无效的this，只能用在构造器，类，对象字面量 "no-irregular-whitespace": 2,//不能有不规则的空格 "no-iterator": 2,//禁止使用__iterator__ 属性 "no-label-var": 2,//label名不能与var声明的变量名相同 "no-labels": 2,//禁止标签声明 "no-lone-blocks": 2,//禁止没必要要的嵌套块 "no-lonely-if": 2,//禁止else语句内只有if语句 "no-loop-func": 1,//禁止在循环中使用函数（若是没有引用外部变量不造成闭包就能够） "no-mixed-requires": [0, false],//声明时不能混用声明类型 "no-mixed-spaces-and-tabs": [2, false],//禁止混用tab和空格 "linebreak-style": [0, "windows"],//换行风格 "no-multi-spaces": 1,//不能用多余的空格 "no-multi-str": 2,//字符串不能用\换行 "no-multiple-empty-lines": [1, {"max": 2}],//空行最多不能超过2行 "no-native-reassign": 2,//不能重写native对象 "no-negated-in-lhs": 2,//in 操做符的左边不能有! "no-nested-ternary": 0,//禁止使用嵌套的三目运算 "no-new": 1,//禁止在使用new构造一个实例后不赋值 "no-new-func": 1,//禁止使用new Function "no-new-object": 2,//禁止使用new Object() "no-new-require": 2,//禁止使用new require "no-new-wrappers": 2,//禁止使用new建立包装实例，new String new Boolean new Number "no-obj-calls": 2,//不能调用内置的全局对象，好比Math() JSON() "no-octal": 2,//禁止使用八进制数字 "no-octal-escape": 2,//禁止使用八进制转义序列 "no-param-reassign": 2,//禁止给参数从新赋值 "no-path-concat": 0,//node中不能使用__dirname或__filename作路径拼接 "no-plusplus": 0,//禁止使用++，-- "no-process-env": 0,//禁止使用process.env "no-process-exit": 0,//禁止使用process.exit() "no-proto": 2,//禁止使用__proto__属性 "no-redeclare": 2,//禁止重复声明变量 "no-regex-spaces": 2,//禁止在正则表达式字面量中使用多个空格 /foo bar/ "no-restricted-modules": 0,//若是禁用了指定模块，使用就会报错 "no-return-assign": 1,//return 语句中不能有赋值表达式 "no-script-url": 0,//禁止使用javascript:void(0) "no-self-compare": 2,//不能比较自身 "no-sequences": 0,//禁止使用逗号运算符 "no-shadow": 2,//外部做用域中的变量不能与它所包含的做用域中的变量或参数同名 "no-shadow-restricted-names": 2,//严格模式中规定的限制标识符不能做为声明时的变量名使用 "no-spaced-func": 2,//函数调用时 函数名与()之间不能有空格 "no-sparse-arrays": 2,//禁止稀疏数组， [1,,2] "no-sync": 0,//nodejs 禁止同步方法 "no-ternary": 0,//禁止使用三目运算符 "no-trailing-spaces": 1,//一行结束后面不要有空格 "no-this-before-super": 0,//在调用super()以前不能使用this或super "no-throw-literal": 2,//禁止抛出字面量错误 throw "error"; "no-undef": 1,//不能有未定义的变量 "no-undef-init": 2,//变量初始化时不能直接给它赋值为undefined "no-undefined": 2,//不能使用undefined "no-unexpected-multiline": 2,//避免多行表达式 "no-underscore-dangle": 1,//标识符不能以_开头或结尾 "no-unneeded-ternary": 2,//禁止没必要要的嵌套 var isYes = answer === 1 ? true : false; "no-unreachable": 2,//不能有没法执行的代码 "no-unused-expressions": 2,//禁止无用的表达式 "no-unused-vars": [2, {"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": 2,//未定义前不能使用 "no-useless-call": 2,//禁止没必要要的call和apply "no-void": 2,//禁用void操做符 "no-var": 0,//禁用var，用let和const代替 "no-warning-comments": [1, { "terms": ["todo", "fixme", "xxx"], "location": "start" }],//不能有警告备注 "no-with": 2,//禁用with "array-bracket-spacing": [2, "never"],//是否容许非空数组里面有多余的空格 "arrow-parens": 0,//箭头函数用小括号括起来 "arrow-spacing": 0,//=>的前/后括号 "accessor-pairs": 0,//在对象中使用getter/setter "block-scoped-var": 0,//块语句中使用var "brace-style": [1, "1tbs"],//大括号风格 "callback-return": 1,//避免屡次调用回调什么的 "camelcase": 2,//强制驼峰法命名 "comma-dangle": [2, "never"],//对象字面量项尾不能有逗号 "comma-spacing": 0,//逗号先后的空格 "comma-style": [2, "last"],//逗号风格，换行时在行首仍是行尾 "complexity": [0, 11],//循环复杂度 "computed-property-spacing": [0, "never"],//是否容许计算后的键名什么的 "consistent-return": 0,//return 后面是否容许省略 "consistent-this": [2, "that"],//this别名 "constructor-super": 0,//非派生类不能调用super，派生类必须调用super "curly": [2, "all"],//必须使用 if(){} 中的{} "default-case": 2,//switch语句最后必须有default "dot-location": 0,//对象访问符的位置，换行的时候在行首仍是行尾 "dot-notation": [0, { "allowKeywords": true }],//避免没必要要的方括号 "eol-last": 0,//文件以单一的换行符结束 "eqeqeq": 2,//必须使用全等 "func-names": 0,//函数表达式必须有名字 "func-style": [0, "declaration"],//函数风格，规定只能使用函数声明/函数表达式 "generator-star-spacing": 0,//生成器函数*的先后空格 "guard-for-in": 0,//for in循环要用if语句过滤 "handle-callback-err": 0,//nodejs 处理错误 "id-length": 0,//变量名长度 "indent": [2, 4],//缩进风格 "init-declarations": 0,//声明时必须赋初值 "key-spacing": [0, { "beforeColon": false, "afterColon": true }],//对象字面量中冒号的先后空格 "lines-around-comment": 0,//行前/行后备注 "max-depth": [0, 4],//嵌套块深度 "max-len": [0, 80, 4],//字符串最大长度 "max-nested-callbacks": [0, 2],//回调嵌套深度 "max-params": [0, 3],//函数最多只能有3个参数 "max-statements": [0, 10],//函数内最多有几个声明 "new-cap": 2,//函数名首行大写必须使用new方式调用，首行小写必须用不带new方式调用 "new-parens": 2,//new时必须加小括号 "newline-after-var": 2,//变量声明后是否须要空一行 "object-curly-spacing": [0, "never"],//大括号内是否容许没必要要的空格 "object-shorthand": 0,//强制对象字面量缩写语法 "one-var": 1,//连续声明 "operator-assignment": [0, "always"],//赋值运算符 += -=什么的 "operator-linebreak": [2, "after"],//换行时运算符在行尾仍是行首 "padded-blocks": 0,//块语句内行首行尾是否要空行 "prefer-const": 0,//首选const "prefer-spread": 0,//首选展开运算 "prefer-reflect": 0,//首选Reflect的方法 "quotes": [1, "single"],//引号类型 `` "" '' "quote-props":[2, "always"],//对象字面量中的属性名是否强制双引号 "radix": 2,//parseInt必须指定第二个参数 "id-match": 0,//命名检测 "require-yield": 0,//生成器函数必须有yield "semi": [2, "always"],//语句强制分号结尾 "semi-spacing": [0, {"before": false, "after": true}],//分号先后空格 "sort-vars": 0,//变量声明时排序 "space-after-keywords": [0, "always"],//关键字后面是否要空一格 "space-before-blocks": [0, "always"],//不以新行开始的块{前面要不要有空格 "space-before-function-paren": [0, "always"],//函数定义时括号前面要不要有空格 "space-in-parens": [0, "never"],//小括号里面要不要有空格 "space-infix-ops": 0,//中缀操做符周围要不要有空格 "space-return-throw-case": 2,//return throw case后面要不要加空格 "space-unary-ops": [0, { "words": true, "nonwords": false }],//一元运算符的前/后要不要加空格 "spaced-comment": 0,//注释风格要不要有空格什么的 "strict": 2,//使用严格模式 "use-isnan": 2,//禁止比较时使用NaN，只能用isNaN() "valid-jsdoc": 0,//jsdoc规则 "valid-typeof": 2,//必须使用合法的typeof的值 "vars-on-top": 2,//var必须放在做用域顶部 "wrap-iife": [2, "inside"],//当即执行函数表达式的小括号风格 "wrap-regex": 0,//正则表达式字面量用小括号包起来 "yoda": [2, "never"]//禁止尤达条件