Regex safelist does not whitelist variant-prefixed utilities in Tailwind CSS v3
Goal: Ensure that a regex safelist pattern such as /bg-(red|blue)/ retains not only the base utilities ( bg-red-500 , bg-blue-500 ) but also their variant‑prefixed forms ( hover:bg-red-500 , focus:bg-blue-500 ) in the final CSS output. Constraint: In Tailwind CSS v3 the safelist implementation evaluates regex patterns against the exact class name only; varia
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