项目添加ESLint
1. 安装
yarn add eslint -D
2. 生成配置文件
npx eslint --init
√ How would you like to use ESLint? · problems
√ What type of modules does your project use? · esm
√ Which framework does your project use? · none
√ Does your project use TypeScript? · No / Yes
√ Where does your code run? · browser, node
√ What format do you want your config file to be in? · JavaScript
3. 检查代码
npx eslint ./
npx eslint \"apps/**/src/**/*.{js,jsx}\" --config .eslintrc.json
其他
plugins: 新增一些规则,然后在rules中使用
extends集成: 使用别人的配置, 如果有冲突的话就rules自己定义
常见错误修改
- !xxx.hasOwnProperty(key); => !Object.prototype.hasOwnProperty.call(xxx, key); 切忌不要把 !xxx 直接复制过来,因为是取反,永远bool值
- const abc = useSelector(xxx) || []; 然后abc在 useCallback中的依赖参数中使用了, 因为存在[] 所以永远会重新渲染
修改方法:const abc = useSelector(xxx) 然后在使用abc的地方 (abc || []).map ..... -
const abc = () => async () => {
new Promise(async (res, rej) => {
if() return xxx if() throw xxx
})
}
===>
const abc = () => async () => { if() return xxx if() throw xxx }
- 不好加propTypes的情况
function happy() { let name = 'Jack'; const array1 = [ { abc({ id }) { console.log(name + id); }, }, ]; const array2 = [ { abc: arg => bbc(arg, name), }, ]; array1[0].abc({ id: 20 }); array2[0].abc({ id: 50 }); } const bbc = ({ id }, name) => { console.log(name + id); }; happy();
无法直接对happy添加propTypes来验证abc中的id,只能把它抽出来
5. 错误修复(应该和npm run build区分开来,不能在跑了ant docker-build的命令后对文件进行改动, 而是只应该提醒)
{ "fix": "eslint src/**/.{js,jsx} --fix --config .eslintrc.js" }