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LibWeb: Implement the CSS revert keyword

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This is a universal value like `initial` and `inherit` and works by
reverting the current value to whatever we had at the start of the
current cascade origin.

The implementation is somewhat inefficient as we make a copy of all
current values at the start of each origin. I'm sure we can come up with
a way to make this faster eventually.
This commit is contained in:
Andreas Kling 2023-07-29 17:14:18 +02:00
parent 13d5d47b56
commit 8f29bdb62c
8 changed files with 257 additions and 187 deletions
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6
Tests/LibWeb/Layout/input/css-revert.html Normal file
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@ -0,0 +1,6 @@
<!doctype html><style>
* {
all: unset;
display: revert;
}
</style>Hello friends