.eslintrc

{
    "parserOptions": {
        "ecmaVersion": 8,
        "sourceType": "module",
        "ecmaFeatures": {
            "experimentalObjectRestSpread": true
        }
    },
    "env": {
        "browser": true,
        "es6": true,
        "node": true
    },
    "globals": {},
    "rules": {
        "semi": [
            "error",
            "never"
        ],
        "no-mixed-spaces-and-tabs": "error",
        "no-tabs": "error",
        "indent": [
            "error",
            4,
            {
                "SwitchCase": 1,
                "VariableDeclarator": 1,
                "outerIIFEBody": 1,
                "MemberExpression": 1,
                "FunctionDeclaration": {
                    "body": 1,
                    "parameters": 1
                },
                "FunctionExpression": {
                    "body": 1,
                    "parameters": 1
                },
                "CallExpression": {
                    "arguments": 1
                }
            }
        ],
        //不允许多个空行
        "no-multiple-empty-lines": "error",
        //禁止在 function的左括号之前使用空格
        "space-before-function-paren": [
            "error",
            {
                "named": "never",
                "anonymous": "never",
                "asyncArrow": "always"
            }
        ],
        //禁止在圆括号内使用空格, ( 左括号右边和右括号左边 )
        "space-in-parens": [
            "error",
            "never"
        ],
        //在一元操作符前后使用空格: 保留字允许空格, 操作符不允许空格
        "space-unary-ops": [
            "error",
            {
                "words": true,
                "nonwords": false
            }
        ],
        //逗号前禁止有空格, 逗号后必须有空格
        "comma-spacing": [
            "error",
            {
                "before": false,
                "after": true
            }
        ],
        //禁止逗号前置
        "comma-style": [
            "error",
            "last"
        ],
        // 对象/数组结尾逗号
        "comma-dangle": [
            "error",
            "always-multiline"
        ],
        //禁止在在计算的属性的方括号中使用空格
        "computed-property-spacing": [
            "error",
            "never"
        ],
        //强制使用1tbs风格的代码块括号 见http://eslint.cn/docs/rules/brace-style
        "brace-style": [
            "error",
            "1tbs"
        ],
        //禁止函数调用时括号左边有空格
        "func-call-spacing": [
            "error",
            "never"
        ],
        //关键字前后必须有空格, (function后必须无空格)
        "keyword-spacing": [
            "error",
            {
                "before": true,
                "after": true
            }
        ],
        //对象名值对的冒号前禁止有空格, 冒号后必须有空格
        "key-spacing": [
            "error",
            {
                "beforeColon": false,
                "afterColon": true,
                "mode": "strict"
            }
        ],
        //禁止条件表达式中出现赋值操作符
        "no-cond-assign": "error",
        //禁止使用嵌套的三元表达式
        "no-nested-ternary": "error",
        //禁止可以表达为更简单结构的三元操作符
        "no-unneeded-ternary": "error",
        //强制使用驼峰命名 MY_FAVORITE_COLOR 这种常量命名是允许的
        "camelcase": "warn",
        //禁止对 Function 对象使用 new 操作符
        "no-new-func": "error",
        //禁止对 String，Number 和 Boolean 使用 new 操作符
        "no-new-wrappers": "error",
        //禁止用对Array使用 new 操作符
        "no-array-constructor": "error",
        //禁止对symbol使用new操作符
        "no-new-symbol": "error",
        //尽可能使用点号取属性
        "dot-notation": "error",
        //当没有严格要求时，禁止对象字面量属性名称使用引号
        "quote-props": [
            "error",
            "as-needed"
        ],
        //iife必须用括号包起来
        "wrap-iife": "error",
        //禁用 arguments.caller 或 arguments.callee
        "no-caller": "error",
        //禁止不必要的 .call() 和 .apply()
        "no-useless-call": "error",
        //this的别名强制使用ctx
        "consistent-this": [
            "error",
            "ctx"
        ],
        //禁止使用eval
        "no-eval": "error",
        //禁止使用__proto__
        "no-proto": "error",
        //禁止使用with语句
        "no-with": "error",
        //禁用 __iterator__ 属性
        "no-iterator": "error",
        //禁用void操作符
        "no-void": "error",
        //禁用标签语句
        "no-labels": "error",
        //要求使用 isNaN() 检查 NaN
        "use-isnan": "error",
        //不建议使用位运算符
        "no-bitwise": "error",
        //禁止抛出异常字面量 必须用new Error
        "no-throw-literal": "error",
        //禁止在条件中使用常量表达式
        "no-constant-condition": "error",
        //禁止不必要的布尔转换
        "no-extra-boolean-cast": "error",
        //要求调用无参构造函数时有圆括号
        "new-parens": "error",
        // 禁用 debugger
        "no-debugger": "error",
        // 禁止 function 定义中出现重名参数
        "no-dupe-args": "error",
        // 禁止对象字面量中出现重复的 key
        "no-dupe-keys": "error",
        // 禁止对 function 声明重新赋值
        "no-func-assign": "error",
        // 警告未使用的变量
        "no-unused-vars": [
            "error",
            {
                "vars": "all",
                "args": "none"
            }
        ],
        // 花括号前加空格
        "space-before-blocks": "error",
        // 禁止使用未声明的变量
        "no-undef": "error",
        "arrow-spacing": "error",
        // let和const优先使用const
        "prefer-const": "error",
        // 注释双斜杠后加一个空格, ----和++++例外
        "spaced-comment": [
            "error",
            "always",
            {
                "exceptions": [
                    "-",
                    "+"
                ]
            }
        ],
        // 代码块花括号内不允许有空行
        "padded-blocks": [
            "error",
            "never"
        ],
        // 要求花括号内有空格 (除了 {})
        "object-curly-spacing": [
            "error",
            "always"
        ],
        // if else 后必须加花括号
        "curly": "error",
        // 一行最大长度
        "max-len": [
            "error",
            100,
            {
                "ignoreComments": true,
                "ignoreUrls": true,
                "ignoreStrings": true,
                "ignoreTemplateLiterals": true,
                "ignoreRegExpLiterals": true
            }
        ],
        // 要求中缀操作符周围有空格 a + b
        "space-infix-ops": "error",
        // 避免使用不必要的字符串拼接 var a = '1' + '0';
        "no-useless-concat": "error",
        // 多行字符串要相加，而不是用链接符
        "no-multi-str": 1,
        // 字符串使用单引号
        "quotes": [
            "error",
            "single",
            {
                "allowTemplateLiterals": true
            }
        ],
        // 禁止同名导入/导出
        // import { foo as foo } from "bar";
        // export { foo as foo };
        "no-useless-rename": [
            "error",
            {
                "ignoreDestructuring": false,
                "ignoreImport": false,
                "ignoreExport": false
            }
        ],
        // 禁止 var a = 1,
        //         b = error;
        // 必须 var a = 1;
        //     var b = error;
        "one-var": [
            "error",
            "never"
        ],
        // Disallow arrow functions where they could be confused with comparisons
        "no-confusing-arrow": [
            "error",
            {
                "allowParens": true
            }
        ],
        "arrow-parens": [
            "warn",
            "as-needed"
        ],
        "no-var": "error",
        "no-const-assign": "error",
        "no-multi-spaces": "error",
        "no-duplicate-imports": "error",
        "no-use-before-define": [
            "error",
            {
                "variables": true,
                "functions": false
            }
        ],
        no-unexpected-multiline: "error"
    }
}