type B<T> = T extends string ? '1' : '2'

const a: B<s
[更多>>>](https://github.com/hsipeng/note/issues/96)
---

#### [前端知识总结](https://github.com/hsipeng/note/issues/95) <sup>0 :speech_balloon:</sup> 	 2020-08-08 08:40:10
:label: : [面试](https://github.com/hsipeng/note/labels/%E9%9D%A2%E8%AF%95), [前端](https://github.com/hsipeng/note/labels/%E5%89%8D%E7%AB%AF), [:+1:置顶](https://github.com/hsipeng/note/labels/%3A%2B1%3A%E7%BD%AE%E9%A1%B6)
自己整理出来的针对 P6 级别的前端知识体系

欢迎批评指正

地址是➡️  [http://hsipeng.github.io/fed](http://hsipeng.github.io/fed)
[更多>>>](https://github.com/hsipeng/note/issues/95)
---

#### [Redux 实现原理](https://github.com/hsipeng/note/issues/94) <sup>0 :speech_balloon:</sup> 	 2020-05-12 16:27:43
:label: : [react](https://github.com/hsipeng/note/labels/react), [redux](https://github.com/hsipeng/note/labels/redux)
```javascript
function createStore(reducer, state = null){
    let listeners = [];
    let getState = () => state;
    let subscribe = listener =>
[更多>>>](https://github.com/hsipeng/note/issues/94)
---

#### [ssl 生成 ssl 证书](https://github.com/hsipeng/note/issues/93) <sup>0 :speech_balloon:</sup> 	 2020-05-12 15:30:58
:label: : [linux](https://github.com/hsipeng/note/labels/linux), [ssl](https://github.com/hsipeng/note/labels/ssl)
## nginx 安装