Bug 158507 - Setting a style on the body right after load doesn't trigger a style recalc
Summary: Setting a style on the body right after load doesn't trigger a style recalc
Status: RESOLVED CONFIGURATION CHANGED
Alias: None
Product: WebKit
Classification: Unclassified
Component: CSS (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-06-07 18:22 PDT by Sam Weinig
Modified: 2022-09-04 13:45 PDT (History)
6 users (show)

See Also:

Attachments
Test case (805 bytes, text/html)
2016-06-07 18:22 PDT, Sam Weinig 		no flags Details
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Description Sam Weinig 2016-06-07 18:22:22 PDT 
Created attachment 280758 [details]
Test case

While investigating a test failure, I ran into this issue.  It seems that if you try to set a style on the body, right after load, and then read it back via getComputedStyle, it won't get set. Interestingly, this only happens the first time. If you immediately set the same style again, it works. Test case attached.
Comment 1 Ahmad Saleem 2022-09-03 14:39:05 PDT 
While trying to reproduce this using attached test case, I get following error in Chrome Canary 107 and Firefox Nightly 106 (just pasting "Chrome" error message but it is same in both):

Uncaught TypeError: window.getComputedStyle(...).getPropertyCSSValue is not a function
    at test (attachment.cgi?id=280758:17:56)
    at window.onload (attachment.cgi?id=280758:28:5)

While Safari Technology Preview 152 (on macOS 12.5.1 in Private Window) jut shows:

PASS: rgb(255, 0, 0) is rgb(255, 0, 0).
PASS: rgb(255, 0, 0) is rgb(255, 0, 0).

Just wanted to share updated results. Thanks!
Comment 2 Alexey Proskuryakov 2022-09-04 13:45:34 PDT 
The test fails in other browsers because on deprecated getPropertyCSSValue.

Since it passes in Safari now, config changed.