配置说明
root: 设置为 true 表示此配置为根配置，ESLint 将不再向上查找父目录的配置文件。parserOptions: 指定解析器选项，使用 babel-eslint 以支持实验性语法，sourceType 为 module 表示使用 ES6 模块。env: 定义代码运行环境，browser 和 es6 分别启用浏览器全局变量和 ES6 语法。extends: 继承的规则集，这里使用了 plugin:vue/recommended（Vue.js 推荐规则）和 eslint:recommended（ESLint 推荐规则）。rules: 自定义规则，覆盖或扩展继承的规则。每条规则后的注释解释了其作用。
配置文件 .eslintrc.js
module.exports = {
root: true,
parserOptions: {
parser: 'babel-eslint',
sourceType: 'module',
ecmaVersion: 6,
},
env: {
browser: true,
es6: true
},
extends: ['plugin:vue/recommended', 'eslint:recommended'],
rules: {
'vue/attribute-hyphenation': 0,
'vue/max-attributes-per-line': [2, { singleline: 10, multiline: { max: 1, allowFirstLine: false } }],
'vue/singleline-html-element-content-newline': 'off',
'vue/multiline-html-element-content-newline': 'off',
'vue/html-closing-bracket-newline': 'off',
'vue/no-v-html': 'off',
'vue/html-self-closing': 0,
'vue/require-default-prop': 0,
'vue/require-prop-types': 0,
'accessor-pairs': 2,
'arrow-spacing': [2, { before: true, after: true }],
'block-spacing': [2, 'always'],
'brace-style': [2, '1tbs', { allowSingleLine: true }],
'camelcase': [2, { properties: 'always' }],
'comma-dangle': [2, 'never'],
'comma-spacing': [2, { before: false, after: true }],
'comma-style': [2, 'last'],
'constructor-super': 2,
'consistent-this': [2, 'that'],
'curly': [2, 'multi-line'],
'dot-location': [2, 'property'],
'eol-last': 2,
'eqeqeq': ['error', 'always', { null: 'ignore' }],
'generator-star-spacing': [2, { before: true, after: true }],
'global-require': 1,
'indent': [2, 2, { SwitchCase: 2 }],
'key-spacing': [2, { beforeColon: false, afterColon: true }],
'keyword-spacing': [2, { before: true, after: true }],
'new-cap': [2, { newIsCap: true, capIsNew: false }],
'new-parens': 2,
'no-array-constructor': 1,
'no-console': process.env.NODE_ENV === 'production' ? 'error' : 'off',
'no-class-assign': 2,
'no-const-assign': 2,
'no-control-regex': 0,
'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
'no-delete-var': 2,
'no-dupe-args': 2,
'no-dupe-class-members': 2,
'no-dupe-keys': 2,
'no-duplicate-case': 2,
'no-empty-character-class': 2,
'no-empty-pattern': 2,
'no-eval': 2,
'no-ex-assign': 2,
'no-extend-native': 2,
'no-extra-boolean-cast': 2,
'no-extra-parens': [2, 'functions'],
'no-fallthrough': 2,
'no-floating-decimal': 2,
'no-func-assign': 2,
'no-implied-eval': 2,
'no-inner-declarations': [2, 'functions'],
'no-invalid-regexp': 2,
'no-irregular-whitespace': 2,
'no-iterator': 2,
'no-label-var': 2,
'no-labels': [2, { allowLoop: false, allowSwitch: false }],
'no-lone-blocks': 2,
'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-new-object': 2,
'no-new-require': 2,
'no-new-symbol': 2,
'no-new-wrappers': 2,
'no-obj-calls': 2,
'no-octal': 2,
'no-octal-escape': 2,
'no-path-concat': 2,
'no-redeclare': 2,
'no-regex-spaces': 2,
'no-return-assign': [2, 'except-parens'],
'no-self-assign': 2,
'no-self-compare': 2,
'no-sequences': 2,
'no-sparse-arrays': 2,
'no-this-before-super': 2,
'no-throw-literal': 2,
'no-trailing-spaces': 2,
'no-undef': 2,
'no-undef-init': 2,
'no-underscore-dangle': 2,
'no-unexpected-multiline': 2,
'no-unmodified-loop-condition': 2,
'no-unneeded-ternary': [2, { defaultAssignment: false }],
'no-unreachable': 2,
'no-unsafe-finally': 2,
'no-unused-vars': [2, { vars: 'all', args: 'after-used' }],
'no-useless-call': 2,
'no-useless-computed-key': 2,
'no-useless-constructor': 2,
'no-useless-escape': 0,
'no-whitespace-before-property': 2,
'no-with': 2,
'no-var': 2,
'one-var': [2, { initialized: 'never' }],
'operator-linebreak': [2, 'after', { overrides: { '?': 'before', ':': 'before' } }],
'padded-blocks': [2, 'never'],
'prefer-destructuring': ['error', { object: false, array: false }],
'quotes': [2, 'single', { avoidEscape: true, allowTemplateLiterals: true }],
'radix': 2,
'semi': [2, 'never'],
'semi-spacing': [2, { before: false, after: true }],
'space-before-blocks': [2, 'always'],
'space-before-function-paren': [2, 'never'],
'space-in-parens': [2, 'never'],
'space-infix-ops': 2,
'space-unary-ops': [2, { words: true, nonwords: false }],
'spaced-comment': [2, 'always', { markers: ['global', 'globals', 'eslint', 'eslint-disable', '*package', '!', ','] }],
'template-curly-spacing': [2, 'never'],
'use-isnan': 2,
'valid-typeof': 2,
'wrap-iife': [2, 'any'],
'yield-star-spacing': [2, 'both'],
'yoda': [2, 'never'],
'prefer-const': 2,
'object-curly-spacing': [2, 'always', { objectsInObjects: false }],
'array-bracket-spacing': [2, 'never']
}
};
