Is there a plan to change the mime from application/javascript to text/javascript type for .js and .mjs files?
At the moment, the new type is already used in mailcap, httpd packages and in the Mozilla browser. According to statistics from the httparchive.org website, it is also seen that it is already used in many places.

Source:

1. https://pagure.io/mailcap/blob/master/f/mime.types
2. apache/httpd@f4230a5
3. https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/MIME_types/Common_types