tailwind-merge

tailwind-merge

Utility function to efficiently merge Tailwind CSS classes in JS without style conflicts.

import { twMerge } from 'tailwind-merge'

twMerge('px-2 py-1 bg-red hover:bg-dark-red', 'p-3 bg-[#B91C1C]')
// → 'hover:bg-dark-red p-3 bg-[#B91C1C]'

• Supports Tailwind v4.0 up to v4.2 (if you use Tailwind v3, use tailwind-merge v2.6.0)
• Works in all modern browsers and maintained Node versions
• Fully typed
• Check bundle size on Bundlephobia

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clsx

clsx is an alternative to classnames with a similar API and is used for constructing class strings conditionally. Like classnames, it does not offer Tailwind-specific deduplication or conflict resolution.