Bug 177847 – data: stylesheets sometimes applied sync and sometimes async

• Status: NEW
• Component: CSS

[Boris Zbarsky]

Created attachment 322616 [details]
Testcase

Consider the attached testcase.  It should have green text per spec: the HTML spec uses fetch to get the resources referenced by <link> elements (see <https://html.spec.whatwg.org/multipage/semantics.html#obtaining-a-resource-from-a-link-element>) and fetch is always an async operation.

In Safari, the text is green the first time I load the testcase in a tab, but becomes red if I reload it.  That's broken.

[Boris Zbarsky]

Note also https://bugs.chromium.org/p/chromium/issues/detail?id=771425

[Radar WebKit Bug Importer]

<rdar://problem/34814066>

[Antti Koivisto]

That's because the seconds time we get the already decoded resource synchronously from the memory cache.

[Ahmad Saleem]

I am not able to reproduce this bug in Safari 16.1 and Safari Technology Preview 156 and it shows "Green" color text and as it should be. I tested it in "Private" window as well to avoid any cache issue. It is matching Firefox Nightly 108 while Chrome Canary 109 still show text as "red".

Is it resolved and can we mark this as "RESOLVED CONFIGURATION CHANGED". Thanks!

[Ahmad Saleem]

(In reply to Ahmad Saleem from comment #4)
> I am not able to reproduce this bug in Safari 16.1 and Safari Technology
> Preview 156 and it shows "Green" color text and as it should be. I tested it
> in "Private" window as well to avoid any cache issue. It is matching Firefox
> Nightly 108 while Chrome Canary 109 still show text as "red".
> 
> Is it resolved and can we mark this as "RESOLVED CONFIGURATION CHANGED".
> Thanks!

Actually ignore my comment, it reproduces in this case:

"In Safari, the text is green the first time I load the testcase in a tab, but becomes red if I reload it.  That's broken."

[Ahmad Saleem]

But it is same with Firefox Nightly 108, where on first load it is "Green" and on reload, it is "Red".