Main question… {% framework extras %} used previously, now throws 404 for loading /framework-extras.js … probably not expected behaviour, becaase it “breaks” all “data-request” and data-attributes handlers.
It should work the same, is that file existing in the system module assets/js ?
default installation of new octobercms … no framework-extras

It should load like this:
- Framework: framework.js (request only)
- Extras: framework-bundle.js (extras)
No need to load framework.js + framework-bundle.js, just one or the other.
daft, not sure if im understand…
when i place {% framework extras %} to layout, why is there request to include framework-extras.js and not framework-bundle.js then? if you telling me, that {% framework %} loads framework and {% extras %} may load bundle?
Yes {% framework extras %} loads framework-bundle.js. Are you seeing something different?

i tried “dry run”
now got
- framework-bundle.js
- framework-extras.css
Assuming this is on v4.1. Search your source files for “framework-extras” perhaps there is a manual reference to it somewhere.
Otherwise the output should look like this:
<script src="/modules/system/assets/js/framework-bundle.min.js"></script>
Also try clearing the Twig cache.