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LibWeb: Support cellpadding=0 and invalidate table cells when it changes

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We were incorrectly treating cellpadding=0 as if the attribute was
missing. This commit fixes it so it behaves as `padding: 0` on cells.

When adding a test, I discovered that we were not invalidating style for
cells when their containing table's cellpadding attribute changed.
So this commit fixes that as well.
This commit is contained in:
Andreas Kling 2025-02-21 00:43:26 +01:00 • committed by Tim Ledbetter
commit 20c859519b
Notes: github-actions[bot] 2025-02-21 01:17:42 +00:00
6 changed files with 44 additions and 15 deletions
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15
Tests/LibWeb/Text/input/HTML/table-cellpadding.html Normal file
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@ -0,0 +1,15 @@
<script src="../include.js"></script>
<table id="table"><td id="td"></td></table>
<script>
function testCellpadding(value) {
table.setAttribute("cellpadding", value);
println(getComputedStyle(td).padding);
}
test(() => {
testCellpadding("1");
testCellpadding("5");
testCellpadding("0");
testCellpadding("-1");
});
</script>