前言
前面文章有写过vscode保存代码,自动按照eslint规范格式化代码设置,但是这篇文章主要是针对vue项目来写的,那么react项目,假如运用typeScript如何做到呢?
使用 AlloyTeam 的 ESLint 配置
ESLint 原生的规则和 @typescript-eslint/eslint-plugin 的规则太多了,而且原生的规则有一些在 TypeScript 中支持的不好,需要禁用掉。 这里我推荐使用 AlloyTeam ESLint 规则中的 TypeScript 版本,它已经为我们提供了一套完善的配置规则,并且与 Prettier 是完全兼容的(eslint-config-alloy 不包含任何代码格式的规则,代码格式的问题交给更专业的 Prettier 去处理)。
安装
npm install --save-dev eslint typescript @typescript-eslint/parser @typescript-eslint/eslint-plugin eslint-config-alloy
假如要检查tsx 文件,还要安装
npm install --save-dev eslint-plugin-react
配置规则
在你的项目根目录下创建 .eslintrc.js,将如下代码复制进去
module.exports = {
root: true,
extends: ['alloy', 'alloy/typescript'],
env: {
browser: true,
node: true,
es6: true
},
globals: {
// Your global variables (setting to false means it's not allowed to be reassigned)
//
// myGlobal: false
},
rules: {
}
}
补充规则
上面配置是纯净规则,我现在把我项目中常用的规则写一下,给大家一个参考。
rules: {
// Customize your rules
'@typescript-eslint/explicit-member-accessibility': 'off',
'@typescript-eslint/member-ordering': 'off',
'max-params': 0,
'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: [0, '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': [
0,
{
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': [0, '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': 0,
'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-useless-call': 2,
'no-useless-computed-key': 0,
'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-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']
}
VSCode
代码规则配置完毕了,下面就是VSCode的配置了,首先,vscode要安装eslint插件。其次在 vscode 首选项 => 设置 => 工作区中添加如下配置(右上角可以切换代码模式 .vscode/settings.json):
{
"eslint.validate": [
"javascript",
"javascriptreact",
{
"language": "vue",
"autoFix": true
},
{
"language": "typescript",
"autoFix": true
},
{
"language": "typescriptreact",
"autoFix": true
}
],
"typescript.tsdk": "node_modules/typescript/lib",
"editor.codeActionsOnSave": {
"source.fixAll.eslint": true
},
"files.eol": "\n",
"editor.tabSize": 2,
"editor.formatOnSave": true,
"editor.defaultFormatter": "esbenp.prettier-vscode"
}
这样就可以保存代码,自动格式化了。
添加Prettier
Prettier是比较专业的格式化工具,关于ts项目,我再介绍一下和Prettier的结合
紧接着上面,我们首先需要安装 Prettier:
npm install --save-dev prettier
然后创建一个 prettier.config.js 文件,里面包含 Prettier 的配置项。Prettier 的配置项很少,这里我推荐大家一个配置规则,作为参考:
module.exports = {
// max 1024 characters per line
printWidth: 1024,
// use 2 spaces for indentation
tabWidth: 2,
// use spaces instead of indentations
useTabs: false,
// semicolon at the end of the line
semi: false,
// use single quotes
singleQuote: true,
// object's key is quoted only when necessary
quoteProps: 'as-needed',
// use double quotes instead of single quotes in jsx
jsxSingleQuote: true,
// no comma at the end
trailingComma: 'none',
// spaces are required at the beginning and end of the braces
bracketSpacing: true,
// end tag of jsx need to wrap
jsxBracketSameLine: false,
// brackets are required for arrow function parameter, even when there is only one parameter
arrowParens: 'always',
// format the entire contents of the file
rangeStart: 0,
rangeEnd: Infinity,
// no need to write the beginning @prettier of the file
requirePragma: false,
// No need to automatically insert @prettier at the beginning of the file
insertPragma: false,
// use default break criteria
proseWrap: 'preserve',
// decide whether to break the html according to the display style
htmlWhitespaceSensitivity: 'css',
// lf for newline
endOfLine: 'lf'
}
适应国际化需求,注释现在都要英文注释了!
然后vscode中的配置文件添加如下(我上文已经添加了):
"editor.defaultFormatter": "esbenp.prettier-vscode",
这样就完成了vscode保存格式化及eslint智能提示的所有配置。