1、爲何要用eslint？
eslint是一個插件化的JavaScript代碼檢測工具，它能夠用於檢查常見的JavaScript代碼錯誤，也能夠進行代碼的風格檢查，咱們能夠針對本身的喜愛，或者團隊的喜歡來指定一套eslint配置，而後用到所編寫的項目上，從而實現輔助編碼規範的執行，有效的控制代碼質量。javascript
下面，給你們介紹在項目當中如何進行eslint的配置。css
①vscode安裝eslinthtml
②通常腳手架當中都有.eslintrc.js文件，沒有能夠新建一個，寫入以下代碼：vue
module.exports = {
root: true,
parserOptions: {
parser: 'babel-eslint',
sourceType: 'module'
},
env: {
browser: true,
node: true,
es6: true,
},
extends: ['plugin:vue/recommended', 'eslint:recommended'],
// add your custom rules here
//it is base on https://github.com/vuejs/eslint-config-vue
rules: {
"vue/order-in-components": [
"error",
{
"order": [
"el",
"name",
"key",
"parent",
"functional",
["delimiters", "comments"],
["components", "directives", "filters"],
"extends",
"mixins",
["provide", "inject"],
"ROUTER_GUARDS",
"layout",
"middleware",
"validate",
"scrollToTop",
"transition",
"loading",
"inheritAttrs",
"model",
["props", "propsData"],
"emits",
"setup",
"fetch",
"asyncData",
"data",
"head",
"computed",
"watch",
"watchQuery",
"LIFECYCLE_HOOKS",
"methods",
["template", "render"],
"renderError"
]
}
],
"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/name-property-casing": ["error", "PascalCase"],
"vue/no-v-html": "off",
'accessor-pairs': 2,
'arrow-spacing': [2, {
'before': true,
'after': true
}],
'block-spacing': [2, 'always'],
'brace-style': [2, '1tbs', {
'allowSingleLine': true
}],
'camelcase': [0, {
'properties': 'always'
}],
'comma-dangle': [2, 'never'],
'comma-spacing': [2, {
'before': false,
'after': true
}],
'comma-style': [2, 'last'],
'constructor-super': 2,
'curly': [2, 'multi-line'],
'dot-location': [2, 'property'],
'eol-last': 2,
'eqeqeq': ["error", "always", { "null": "ignore" }],
'generator-star-spacing': [2, {
'before': true,
'after': true
}],
'handle-callback-err': [2, '^(err|error)$'],
'indent': [2, 2, {
'SwitchCase': 1
}],
'jsx-quotes': [2, 'prefer-single'],
'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': 2,
'no-caller': 2,
'no-console': 'off',
'no-class-assign': 2,
'no-cond-assign': 2,
'no-const-assign': 2,
'no-control-regex': 0,
'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-bind': 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-negated-in-lhs': 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-proto': 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-shadow-restricted-names': 2,
'no-spaced-func': 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-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': 'none'
}],
'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,
'one-var': [2, {
'initialized': 'never'
}],
'operator-linebreak': [2, 'after', {
'overrides': {
'?': 'before',
':': 'before'
}
}],
'padded-blocks': [2, 'never'],
'quotes': [2, 'single', {
'avoidEscape': true,
'allowTemplateLiterals': true
}],
'semi': [2, 'never'],
'semi': ["error", "always"],
'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,
'no-debugger': process.env.NODE_ENV === 'production' ? 2 : 0,
'object-curly-spacing': [2, 'always', {
objectsInObjects: false
}],
'array-bracket-spacing': [2, 'never']
}
}
③vscode中 依次點擊 設置-->首選項-->設置--->在setting.json中編輯java
加入以下代碼，而後重啓服務。node
"files.autoSave": "off",
"eslint.validate": [
"javascript",
"javascriptreact",
"vue-html",
{
"language": "vue",
"autoFix": true
}
],
"eslint.run": "onSave",
"eslint.autoFixOnSave": true,
④隨便找個文件測試按住control+s測試，能夠看到：（vue實例對象的屬性也是按照必定規則排序的，詳情請見上述eslint.js的配置）react
2、快速生成vue模板
①配置模板快速生成單文件組件的模板，點擊code-->首選項-->用戶代碼片斷，輸入vue，選擇vue.jsongit
將下列代碼加入到vue.json當中：es6
{
"Print to console": {
"prefix": "vue",
"body": [
"<template>",
" <div class=\"$1\">$0</div>",
"</template>",
"",
"<script>",
"export default {",
" name:'$2',",
" components:{},",
" mixins: [], ",
" props:{},",
" data(){",
" return {",
" }",
" },",
" computed:{},",
" watch:{},",
" created(){},",
" mounted(){},",
" methods:{},",
"}",
"</script>",
"<style lang=\"scss\" scoped>",
".$1{}",
"</style>"
],
"description": "A vue file template"
}
}
上面的gif沒錄全，就是在文件中打入 vue，回車，按照上述步驟就能夠快速生成vue模板和光標插入，按tab鍵能夠切換下一個光標。很好用。github