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LibWeb: Return error on modification of a computed CSS style declaration

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Previously, calling `setProperty` or `removeProperty` from JS on a
CSSStyleDeclaration returned from `getComputedStyle()` would return
null. We now return a NoModificationAllowedError instead, which aligns
our implementation with the specification.
This commit is contained in:
Tim Ledbetter
2024-08-04 22:12:31 +01:00
committed by Andreas Kling
parent 08d60d7521
commit ea68bdef26
Notes: github-actions[bot] 2024-08-05 07:56:40 +00:00 
Author: https://github.com/tcl3
Commit: https://github.com/LadybirdBrowser/ladybird/commit/ea68bdef262
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/964
5 changed files with 51 additions and 4 deletions
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Tests/LibWeb/Text/expected/css/CSSStyleDeclaration-modify-computed.txt Normal file
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Calling setProperty() on a computed CSSStyleDeclaration throws error of type: NoModificationAllowedError
Calling removeProperty() on a computed CSSStyleDeclaration throws error of type: NoModificationAllowedError