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CSS: Justify use of rtrim on CSS property values

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CSS does not acknowledge carriage return or form feed characters
as whitespace but it does replace them with whitespace, making it
acceptable to use `rtrim`.

Closes gh-4956

(cherry picked from commit 655c0ed5e2)
This commit is contained in:
Richard Gibson 2022-01-03 07:28:49 -05:00 committed by Michał Gołębiowski-Owczarek
parent 5566988359
commit a1373e2e4f
1 changed files with 6 additions and 0 deletions
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6
src/css/curCSS.js
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@ -32,6 +32,12 @@ function curCSS( elem, name, computed ) {
// trim whitespace for custom property (issue gh-4926)
if ( isCustomProp ) {
// rtrim treats U+000D CARRIAGE RETURN and U+000C FORM FEED
// as whitespace while CSS does not, but this is not a problem
// because CSS preprocessing replaces them with U+000A LINE FEED
// (which *is* CSS whitespace)
// https://www.w3.org/TR/css-syntax-3/#input-preprocessing
ret = ret.replace( rtrimCSS, "$1" );
}