ES6 modules in local files - The server responded with a non-JavaScript MIME type

Question

I get this error:

Failed to load module script: The server responded with a non-JavaScript MIME type of \"\". Strict MIME type checking is enforced fo

Answer 1

On Windows, i cannot get ES 2016 modules to load correctly. Even if you disable security, then you get hit by the next prolem which is the .js files don't have a MIME type set, so you get a message like Failed to load module script: The server responded with a non-JavaScript MIME type of "". Strict MIME type checking is enforced for module scripts per HTML spec.

The answer is to use Safari on the macintosh, which allows local files no problem with ES 2016 modules. Interestingly both Chrome and Firefox also fail to work properly. Frankly this is a bug, because when you are loading a local file, there is absolutely nothing insecure about accessing files from the same folder. But good luck getting Google or Firefox to fix this. Apple even has a flag about cross-scripting permissions in their pulldown menu, so they know how important it is to disable nonsense security stuff.