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May 12, 2021 Replied to a topic by henryhu › Node.js › Typescript 越来越流行吗？我觉得它带来的收益还是小于成本，对于已经存在的项目，没有必要使用 TS |
Typescript 其实是给了 Javascript 一个很好的静态约束，我们公司所有的项目都是用了 Typescript 的。
我觉得无论是大项目还是小项目，都应该上 Typescript，好处有 3
1. VSCode 支持 Typescript 的类型推断，如果你定义好了类型，那么在任意的文件里面你都能看到当前的值是什么样的，不需要一点点找变量声明的地方
2. 减少低级错误，如果是 Javascript，如果一个 Object 里面某个值的 key 里面有 typo，那么 Javascript 一般是不会报错的，但是如果用了 Typescript，就会在运行前直接报错出来
3. 对于长时间维护的项目，减少对于旧代码的回忆成本
我觉得无论是大项目还是小项目，都应该上 Typescript，好处有 3
1. VSCode 支持 Typescript 的类型推断，如果你定义好了类型，那么在任意的文件里面你都能看到当前的值是什么样的，不需要一点点找变量声明的地方
2. 减少低级错误，如果是 Javascript，如果一个 Object 里面某个值的 key 里面有 typo，那么 Javascript 一般是不会报错的，但是如果用了 Typescript，就会在运行前直接报错出来
3. 对于长时间维护的项目，减少对于旧代码的回忆成本
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