Consider removing the .css() behavior of detecting vendor-prefixed versions of props #5585
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Description
Description
Since jQuery 1.8.0, jQuery automatically finds a properly prefixed version of a CSS property, provided that the unprefixed version is not supported.
Over time, browsers decided to no longer expose experimental properties under prefixed names and previously prefixed versions have largely become unprefixed.
One important property where this hasn't happened yet is user-select which is still prefixed in Safari: https://bugs.webkit.org/show_bug.cgi?id=208677
More context in this comment & the following ones: #5583 (comment)