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LibWeb: Use correct reference for abspos elements with % height sizes

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Absolutely positioned elements should have their percentage sizes
resolved against the padding box of the containing block, not the
content box.

From CSS-POSITION-3 <https://www.w3.org/TR/css-position-3/#def-cb>

"..the containing block is formed by the padding edge of the ancestor.."
This commit is contained in:
Andreas Kling 2023-06-17 20:06:41 +02:00
parent 357174d8fd
commit c374541711
3 changed files with 20 additions and 2 deletions
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14
Tests/LibWeb/Layout/input/block-and-inline/abspos-with-percentage-height-resolved-against-padding-box-of-containing-block.html Normal file
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@ -0,0 +1,14 @@
<!DOCTYPE html><style>
body {
position: relative;
padding-top: 30%;
}
.abspos {
position: absolute;
width: 100%;
height: 100%;
top: 0px;
left: 0px;
background: orange;
}
</style><body><div class="abspos">