HTMLImageElement.decoding should reflect the decoding content attribute, limited to only known values. We are currently missing the *limited to only known values* logic: - https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-decoding
Created attachment 433803 [details] Patch
Created attachment 433820 [details] Patch
Committed r280047 (239782@main): <https://commits.webkit.org/239782@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 433820 [details].
<rdar://problem/80803070>