HTMLStyleElement should be able to fire the load event more than once. WebKit has a flag preventing the load event to fire more than once but this behavior is not present in the HTML specification and doesn't match other browsers.
Created attachment 435301 [details] Patch
Comment on attachment 435301 [details] Patch cq- because I will delay landing this until it is safe to do so.
<rdar://problem/82048699>
Committed r281443 (240826@main): <https://commits.webkit.org/240826@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 435301 [details].