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theme() functions are evaluated in media query ranges with collapsed whitespace (#14321)
Fixes #14320 This PR adds `>`, `<`, and `=` as separators into the CSS value parser. This is necessary because [`@media` range context](https://www.w3.org/TR/mediaqueries-4/#mq-range-context) does not require spaces around these operators so something like this is a valid value for the range syntax: ```css @media (40rem<width<=48rem) { /* ... */ } ``` If you add our CSS `theme()` function to the mix, this rule look like that: ```css @media (theme(--breakpoint-sm)<width<=theme(--breakpoint-md)) { /* ... */ } ``` --------- Co-authored-by: Adam Wathan <adam.wathan@gmail.com>
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