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[cssom] Add test for synchronization between css declaration block and style attribute #9376

merged 2 commits into from Feb 11, 2018


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upsuper commented Feb 4, 2018

This is test for proposed spec change in w3c/csswg-drafts#2269.


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upsuper commented Feb 4, 2018

Currently, Firefox fails one test that it generates mutation record even when removing non-existing property from the CSS declaration block. We are going to fix this in Gecko bug 1435139.

WebKit and Blink both fail a test that they don't generate mutation record when setting the same value to CSS declaration block. Based on my reasoning in w3c/csswg-drafts#2269 (comment), I tend to keep the proposed behavior as-is, and ask those browsers to change their behavior here.

WebKit fails another test in addition that it doesn't clear the declaration block when the style attribute is removed. This is definitely a bug for them should be fixed.

I haven't tested Edge because I'm not using my Windows laptop at the moment.


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w3c-bots commented Feb 4, 2018


Started: 2018-02-11 22:32:02
Finished: 2018-02-11 22:36:18

Failing Jobs

  • chrome:dev
  • safari:11.0
  • MicrosoftEdge:16.16299

View more information about this build on:


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upsuper commented Feb 5, 2018

Hmmm, after fixing that issue, Gecko will fail the same test as Blink :/

(The test itself matches the proposed spec change, but we may want to decide what should we do for setProperty.)

@upsuper upsuper force-pushed the upsuper:css-style-attr-decl-block branch from 5df2b0a to a80c55c Feb 5, 2018


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zcorpan commented Feb 11, 2018

I added a commit to test
by testing what bz suggested in
w3c/csswg-drafts#1559 (comment)

@upsuper upsuper merged commit c81c644 into web-platform-tests:master Feb 11, 2018

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@upsuper upsuper deleted the upsuper:css-style-attr-decl-block branch Feb 11, 2018

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