When serving JavaScript files, is it better to use the application/javascript or application/x-javascript

According to the IETF’s ECMAScript Media Types Updates as of 22 February 2021, the RFC-4329 is obsolete.

Therefore:

• text/javascript is a recommended standard (both by IETF and by MDN)
• application/x-javascript was experimental while deciding to move to…
• application/javascript is obsolete