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LibWeb: Implement the transition-behavior CSS property

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This specifies whether transitions should be started for transitions
whose animation behavior is discrete.
This commit is contained in:
Tim Ledbetter 2025-04-17 19:11:14 +01:00 • committed by Sam Atkins
commit 542c3cbe51
Notes: github-actions[bot] 2025-05-02 10:08:20 +00:00
20 changed files with 289 additions and 47 deletions
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57
Tests/LibWeb/Text/input/wpt-import/css/css-transitions/parsing/transition-behavior.html Normal file
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<!DOCTYPE html>
<link rel=author href="mailto:jarhar@chromium.org">
<link rel=help href="https://github.com/w3c/csswg-drafts/issues/8857">
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script src="../../../css/support/parsing-testcommon.js"></script>
<script src="../../../css/support/computed-testcommon.js"></script>
<div id="target"></div>
<script>
test_valid_value('transition-behavior', 'normal');
test_computed_value('transition-behavior', 'normal');
test_valid_value('transition-behavior', 'allow-discrete');
test_computed_value('transition-behavior', 'allow-discrete');
test_valid_value('transition', 'allow-discrete display', 'display allow-discrete');
test_computed_value('transition', 'allow-discrete display', 'display allow-discrete');
test_valid_value('transition', 'allow-discrete display 3s', 'display 3s allow-discrete');
test_computed_value('transition', 'allow-discrete display 3s', 'display 3s allow-discrete');
test_valid_value('transition', 'allow-discrete display 3s 1s', 'display 3s 1s allow-discrete');
test_computed_value('transition', 'allow-discrete display 3s 1s', 'display 3s 1s allow-discrete');
test_valid_value('transition', 'allow-discrete display 3s ease-in-out', 'display 3s ease-in-out allow-discrete');
test_computed_value('transition', 'allow-discrete display 3s ease-in-out', 'display 3s ease-in-out allow-discrete');
test_valid_value('transition', 'allow-discrete display 3s ease-in-out 1s', 'display 3s ease-in-out 1s allow-discrete');
test_computed_value('transition', 'allow-discrete display 3s ease-in-out 1s', 'display 3s ease-in-out 1s allow-discrete');
test_invalid_value('transition', 'asdf display');
test_invalid_value('transition', 'display asdf');
// Putting "discrete" anywhere in the shorthand should still work
test_valid_value('transition', 'display allow-discrete 3s ease-in-out 1s', 'display 3s ease-in-out 1s allow-discrete');
test_valid_value('transition', 'display 3s allow-discrete ease-in-out 1s', 'display 3s ease-in-out 1s allow-discrete');
test_valid_value('transition', 'display 3s ease-in-out allow-discrete 1s', 'display 3s ease-in-out 1s allow-discrete');
test_valid_value('transition', 'display 3s ease-in-out 1s allow-discrete', 'display 3s ease-in-out 1s allow-discrete');
test_computed_value('transition', 'display allow-discrete 3s ease-in-out 1s', 'display 3s ease-in-out 1s allow-discrete');
test_computed_value('transition', 'display 3s allow-discrete ease-in-out 1s', 'display 3s ease-in-out 1s allow-discrete');
test_computed_value('transition', 'display 3s ease-in-out allow-discrete 1s', 'display 3s ease-in-out 1s allow-discrete');
test_computed_value('transition', 'display 3s ease-in-out 1s allow-discrete', 'display 3s ease-in-out 1s allow-discrete');
// Serialization with multiple shorthands, including different order
test_valid_value('transition',
'allow-discrete display, normal opacity, color',
'display allow-discrete, opacity, color');
test_computed_value('transition',
'allow-discrete display, normal opacity, color',
'display allow-discrete, opacity, color');
test_valid_value('transition',
'normal opacity, color, allow-discrete display',
'opacity, color, display allow-discrete');
test_computed_value('transition',
'normal opacity, color, allow-discrete display',
'opacity, color, display allow-discrete');
</script>