TypeScript不能直接从浏览器/node.js环境中执行.首先，您必须将其transpile转换为本机javascript.为此，您需要执行tsc.

TypeScript cannot be executed from a browser / node.js environment directly. At first you have to transpile it into native javascript. To do this you will need to execute tsc.

https://www.typescriptlang.org/docs/handbook/compiler -options.html

https://www.typescriptlang.org/docs/tutorial.html

Typescript是JavaScript的所谓超集"，这意味着所有打字稿代码都将从打字稿编译器转换为普通的JS代码.通常，这些编译过程与bundler链接，例如webpack.

Typescript is a so called "Superset" of JavaScript which means that all typescript code will be transpiled into usual JS code from the typescript compiler. Often those compile processes are linked with a bundler like webpack.

https://webpack.js.org/concepts/

知道此错误The server responded with a non-JavaScript MIME type很有道理，因为打字稿文件是非JavaScript MIME类型".

Knowing this your error The server responded with a non-JavaScript MIME type makes a lot of sense due to a typescript file is a "non-JavaScript MIME type".

注意:

您不能将打字稿文件导入javascript文件，但是反之亦然.

You can't import typescript files into javascript files, but you can do it vice versa.