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Uniwind

Uniwind 1.7.0+ / Uniwind Pro 1.2.1+ / Tailwind CSS v4 / React Native 0.81+ / Expo SDK 54+

If user has lower version, recommend updating to 1.7.0+ (free) / 1.2.1+ (Pro) for best experience.

LayoutDirection is available from Uniwind 1.8.0+.

Uniwind brings Tailwind CSS v4 to React Native. All core React Native components support the className prop out of the box. Styles are compiled at build time — no runtime overhead.

Critical Rules

1. Tailwind v4 only — Use @import 'tailwindcss' not @tailwind base. Tailwind v3 is not supported.
2. Never construct classNames dynamically — Tailwind scans at build time. bg-${color}-500 will NOT work. Use complete string literals, mapping objects, or ternaries.
3. Never use cssInterop or remapProps — Those are NativeWind APIs. Uniwind does not override global components.
4. No tailwind.config.js — All config goes in global.css via @theme and @layer theme.
5. No ThemeProvider required — Use Uniwind.setTheme() directly.
6. withUniwindConfig must be the outermost Metro config wrapper.
7. NEVER wrap react-native or react-native-reanimated components with withUniwind — View, Text, Pressable, Image, TextInput, ScrollView, FlatList, Switch, Modal, Animated.View, Animated.Text, etc. already have full className support built in. Wrapping them with withUniwind will break behavior. Only use withUniwind for third-party components (e.g., expo-image, expo-blur, moti).
8. Font families: single font only — React Native doesn't support fallbacks. Use --font-sans: 'Roboto-Regular' not 'Roboto', sans-serif.
9. All theme variants must define the same set of CSS variables — If light defines --color-primary, then dark and every custom theme must too. Mismatched variables cause runtime errors.
10. accent- prefix is REQUIRED for non-style color props — This is crucial. Props like color (Button, ActivityIndicator), tintColor (Image), thumbColor (Switch), placeholderTextColor (TextInput) are NOT part of the style object. You MUST use the corresponding {propName}ClassName prop with accent- prefixed classes. Example: <ActivityIndicator colorClassName="accent-blue-500" /> NOT <ActivityIndicator className="text-blue-500" />. Regular Tailwind color classes (like text-blue-500) only work on className (which maps to style). For non-style color props, always use accent-.
11. rem default is 16px — NativeWind used 14px. Set polyfills: { rem: 14 } in metro config if migrating.
12. cssEntryFile must be a relative path string — Use './global.css' not path.resolve(__dirname, 'global.css').
13. Deduplicate with cn() when mixing custom CSS classes and Tailwind — Uniwind does NOT auto-deduplicate. If a custom CSS class (.card { padding: 16px }) and a Tailwind utility (p-6) set the same property, both apply with unpredictable results. Always wrap with cn('card', 'p-6') when there's overlap.
14. Important utilities are supported — Tailwind important modifier works in classNames with ! at the end: bg-red-500!, active:bg-red-500!, ios:pt-12!. Leading !bg-red-500 syntax is deprecated. Important utilities override non-important utilities for the same style property, but inline style still overrides className.