Typescript --allowJs 如何工作? [英] How does Typescript --allowJs work?

问题描述

我已阅读:

• TypeScript 路线图 1.8
• TypeScript 中的 JavaScript合辑
• Js的编译文件
• 宣布 TypeScript 1.8测试版

但我仍然不明白它是如何工作的以及它有什么好处.可以有人请解释它是什么以及我什么时候想使用它?

but I still don't get how it works and what it is good for. Could someone please explain what it is and when I would want to use it?

推荐答案

来自 Clay Allsopp on Medium:

allowJs 是 1.8 中新提供的选项.打字稿编译器将对 .js 文件运行快速健全性检查以查找语法错误，但否则将它们直接传递到输出目录.

allowJs is the option newly available in 1.8. The TypeScript compiler will run a quick sanity check on .js files for syntax errors but otherwise passes them straight through to the output directory.

这在将 JavaScript 项目迁移到 TypeScript 时很有用，这样您就不必一次迁移所有内容，而是开始在 TypeScript 中编写新代码和/或逐个迁移每个文件.您可以在 TypeScript 的官方网站上找到有关从 JavaScript 迁移到 Typescript 的更多信息，该网站有一个名为从 JavaScript 迁移".

This is useful when migrating a JavaScript project to TypeScript, that way you don't have to migrate everything at once but instead start writing new code in TypeScript and/or migrate each file one by one. You can find more information about migration from JavaScript to Typescript on the official site for TypeScript that has a tutorial called "Migrating from JavaScript".

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