Problem/Description¶

It's quit common to use file ending mjs in the node-js universe in productive environments. There is no need to add them into DDEV's .htaccess, but on at least 2 checked known TYPO3 hoster companies, mjs isn't delivered with mime-type application/javascript (like js is).

My scenario where I had troubles¶

The reason for this issue was that I'm using datatables package in a TYPO3 backend module datatables.net-bs5. In the DDEV env all is working well. After deploying to production – in my case Mittwald (hey, I'm not bad-mouthing the host!) – a mime-type error occurs. First I thought that CSP could be problematic. After a quick research I came with the conclusion that this is a quite common file ending which should be added to core's root-htaccess.

ToDo(s)¶

• Add simple support for mjs via htaccess o-o-t-b in the TYPO3 core.

Acceptance Criteria¶

• mjs file response contains an application/javascript mime-type