Fix pseudo-class specificity calculation per CSS spec - #76
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[WIP] Update specificity calculation to support pseudo-classesFix pseudo-class specificity calculation per CSS specApr 21, 2026
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@copilot remove the .gitignore and LICENSE files; those are managed outside the repo. |
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@copilot Add a news fragment using towncrier (or simulating towncrier). Make it a minor scope. |
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Pseudo-classes (
:hover,:last-child,:nth-child(), etc.) were not counted in specificity at all, violating the CSS spec which places them in the class weight column (column c).Changes
cssutils/css/selector.py— InNew.append(), add'pseudo-class'to the condition incrementingspecificity[2]. Pseudo-elements,:not()(which contributes no specificity itself), and expression content inside pseudo-class functions are all unaffected.tests/test_selector.py— Correcta:hoverexpectation(0,0,0,1)→(0,0,1,1); add test cases for:last-child,:nth-child(), and the issue's example selector.