typescript2---泛型和接口案例
泛型
类的泛型
// 类型断言 as 可以转为想要的类型
let name5 : string | number // = 3
(name5 as string).toLocaleLowerCase();
(name5 as number).toFixed();
![](https://img2020.cnblogs.com/blog/1475104/202106/1475104-20210611191407135-1512721695.png)
![](https://img2020.cnblogs.com/blog/1475104/202106/1475104-20210611193331254-1650698248.png)
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接口