我已经搜索了几个小时，发现可以通过服务器(例如node.js)托管我的应用

I've googled that for hours and found out that I can host my app by a server (like node.js)

是

，然后允许CORS.

and then to allow CORS.

由于它将是同源的，因此您不需要CORS.

Since it will be Same Origin, you won't need CORS.

但是我不需要任何服务器.我只需要一个简单的html和一个js文件.

However I don't want any server. I want just a simple html and a js file.

然后，您将无法使用浏览器端的ES6模块.

Then you can't use browser-side ES6 modules.

您首先需要编写代码以不使用模块，或者使用Webpack或Rollup之类的代码将代码转换为不使用模块.

You'll need to either write the code to not use modules in the first place, or use something like Webpack or Rollup to convert the code to not use modules afterwards.