nativewind（nativewind 命令行）

NativeWind

Overview

NativeWind 4.x bridges Tailwind CSS 3.x into React Native, enabling className props on View, Text, Pressable, ScrollView, and other RN components. Provides familiar Tailwind utility classes with native rendering.

Install: pnpm add nativewind tailwindcss@3 + babel/metro configuration

Workflows

Initial setup:

1. Install: pnpm add nativewind tailwindcss@3
2. Create tailwind.config.js with content paths pointing to app/, components/, etc.
3. Create global.css with @tailwind base; @tailwind components; @tailwind utilities;
4. Update babel.config.js: add nativewind/babel preset
5. Update metro.config.js: wrap with withNativeWind
6. Create nativewind-env.d.ts with /// <reference types="nativewind/types" />
7. Import global.css in root _layout.tsx

Styling a component:

1. Import RN component (View, Text, Pressable, etc.)
2. Apply className prop with Tailwind utilities
3. Use contentContainerClassName for ScrollView/FlashList inner styling
4. Test on device/simulator to verify rendering

Guidance

Configuration Files

Three config files are required:

babel.config.js: Add NativeWind preset

presets: ['babel-preset-expo', 'nativewind/babel']

metro.config.js: Wrap Metro config with NativeWind

withNativeWind(config, { input: './global.css' })

tailwind.config.js: Standard Tailwind 3.x config with RN content paths

content: ['./app/**/*.{ts,tsx}', './components/**/*.{ts,tsx}']

className Prop

NativeWind adds className support to all RN core components:

• <View className="flex-1 bg-white p-4">
• <Text className="text-lg font-bold text-gray-900">
• <Pressable className="bg-blue-500 rounded-lg p-3">
• <ScrollView className="flex-1" contentContainerClassName="p-4 gap-3">

Key Differences from Web Tailwind

Conditional Classes

Concatenate class strings conditionally:

className={`px-4 py-2 rounded-lg ${isActive ? 'bg-blue-500' : 'bg-gray-200'}`}

Or use a utility like clsx/cn for cleaner conditionals.

ScrollView Styling

ScrollView has two className targets:

• className — outer container styling
• contentContainerClassName — inner content styling (padding, gap, alignment)

Always use contentContainerClassName for padding and spacing of scroll content.

Theme Customization

Extend via tailwind.config.js theme:

theme: {
  extend: {
    colors: { brand: { 50: '...', 500: '...', 900: '...' } },
    fontFamily: { sans: ['Inter'] }
  }
}

Best Practices

• Always create nativewind-env.d.ts for TypeScript className type support
• Use contentContainerClassName on ScrollView, not className for inner spacing
• Remember flex defaults to column in RN — add flex-row explicitly when needed
• Import global.css at the top of root _layout.tsx
• Use Tailwind's spacing scale consistently (avoid mixing with StyleSheet)
• Keep tailwind.config.js content paths accurate to avoid missing styles
• Use gap-* instead of margin between siblings for consistent spacing

Anti-Patterns

• Mixing StyleSheet.create() with className in the same component (pick one)
• Using hover: or cursor- utilities (not available on mobile)
• Forgetting contentContainerClassName on ScrollView (padding won't work on className)
• Using grid utilities (not supported in RN — use flex layouts)
• Placing bare strings without <Text> wrapper (crashes on RN)
• Not including all source directories in tailwind.config.js content array
• Using Tailwind CSS 4.x syntax (NativeWind requires Tailwind 3.x)