.eslintrc.json

{
    "env": {   
        "browser": true,
        "node": true,    
        "commonjs": true,
        "es6": true       
    },
    "extends": "eslint:recommended",
    "parserOptions": {
        "sourceType": "module",
        "ecmaVersion": 6,
        "ecmaFeatures": {
            "arrowFunctions": true,
            "binaryLiterals": true,
            "blockBindings": true,
            "classes": true,
            "defaultParams": true,
            "destructuring": true,
            "forOf": true,
            "generators": true,
            "modules": true,
            "objectLiteralComputedProperties": true,
            "objectLiteralDuplicateProperties": true,
            "objectLiteralShorthandMethods": true,
            "objectLiteralShorthandProperties": true,
            "octalLiterals": true,
            "regexUFlag": true,
            "regexYFlag": true,
            "spread": true,
            "superInFunctions": true,
            "templateStrings": true,
            "unicodeCodePointEscapes": true,
            "globalReturn": true,           
            "experimentalObjectRestSpread": true
        }
    },
   "rules": {
        //警告
        "quotes": [
            1,
            "single"
        ],
        "semi": [
            1,
            "never"
        ],
        "no-unused-vars": [
            1,
            {
                "caughtErrorsIgnorePattern": "^next"
            }
        ],
        "no-extra-semi": "error", //多余的分号
        "no-console": "warn", //控制台
        "no-empty": "warn", //块语句中的内容不能为空
        "default-case": "error", //case 必须有 default
        //错误     
        "comma-dangle": [
            "error",
            "never"
        ], //定义数组或对象最后多余的逗号
        "no-catch-shadow": "error", //禁止catch子句参数与外部作用域变量同名
        "no-cond-assign": "error", //禁止在条件表达式中使用赋值语句
        "no-constant-condition": "error", //禁止在条件中使用常量表达式 if(true) if(1)
        "no-dupe-keys": "error", //在创建对象字面量时不允许键重复 {a:1,a:1}
        "no-dupe-args": "error", //函数参数不能重复
        "no-duplicate-case": "error", //switch中的case标签不能重复
        "no-empty-character-class": "error", //正则表达式中的[]内容不能为空
        "no-invalid-regexp": "error", //无效的正则 
        "valid-typeof": "error", //无效的类型判断
        "no-unexpected-multiline": "error", //行尾缺少分号可能导致一些意外情况
        "no-sparse-arrays": "error", //数组中多出逗号
        "no-shadow-restricted-names": "error", //关键词与命名冲突
        "no-eval": "error", //禁止使用eval
        "no-extend-native": "error", //禁止扩展native对象
        "no-extra-parens": "error", //禁止非必要的括号
        "no-func-assign": "error", //禁止重复的函数声明
        "no-inline-comments": "error", //禁止行内备注
        "no-redeclare": "error", //禁止重复声明变量    
        "no-undef": "error", //不能有未定义的变量
        "no-unreachable": "error", //不能有无法执行的代码
        "no-with": "error", //禁用with

        //代码风格优化
        "no-else-return":"warn", //在else代码块中return，else是多余的
        "no-multi-spaces":"warn", //不允许多个空格
        "key-spacing": [
            "warn",
            {
                "beforeColon": false,
                "afterColon": true
            }
        ], //object直接量建议写法 : 后一个空格签名不留空格
        "block-scoped-var":"error", //变量定义后未使用
        "consistent-return":"warn", //函数返回值可能是不同类型
        "accessor-pairs":"warn", //object getter/setter方法需要成对出现
        "dot-location": [
            "warn",
            "property"
        ], //换行调用对象方法  点操作符应写在行首
        "no-lone-blocks": "error", //多余的{}嵌套
        "no-labels": "error", //无用的标记      
        "no-floating-decimal":"error", //浮点型需要写全 禁止.1 或 2.写法
        "no-loop-func": "error", //禁止在循环体中定义函数
        "no-new-func":"error", //禁止new Function(...) 写法
        "no-self-compare": "error", //不允与自己比较作为条件
        "no-sequences":"error", //禁止可能导致结果不明确的逗号操作符
        "no-throw-literal": "error", //禁止抛出一个直接量 应是Error对象
        "no-return-assign": [
            "warn",
            "always"
        ], //不允return时有赋值操作        
        "no-unused-expressions": [
            "error",
            {
                "allowShortCircuit": true,
                "allowTernary": true
            }
        ], //未使用的表达式
        "no-useless-call": "error", //无意义的函数call或apply
        "no-useless-concat": "error", //无意义的string concat
        "no-void": "error", //禁用void     
        "no-warning-comments": [
           "error",
            {
                "terms": [
                    "todo",
                    "fixme",
                    "any other term"
                ],
                "location": "anywhere"
            }
        ], //标记未写注释
        "curly":"error" //if、else、while、for代码块用{}包围
    }
}