Responsive, Edge-to-Edge & Accessible UI

Treat Responsive, Edge-to-Edge & Accessible UI as a native UI contract covering Yoga constraints, pixel density, font scaling, safe areas, the keyboard, touch targets, the accessibility tree, and iOS/Android differences—not merely screen styling syntax.

Build a Complete Mental Model

Apply It in Production React Native

Test an original Responsive, Edge-to-Edge & Accessible UI example on Android and iOS with small and large screens, font scaling, dark mode, keyboard and screen reader use, slow/offline networking, denied permissions, and background/foreground transitions. Use DevTools, tests, and a release build where relevant.

After This Lesson

Explain the shared-code and platform boundary
Build an example with loading, error, and accessibility states
Verify one Android/iOS behavior with a test or profiler

tsx

import { Text, useWindowDimensions, View } from 'react-native';
import { SafeAreaView } from 'react-native-safe-area-context';

export function Dashboard() {
  const { width, fontScale } = useWindowDimensions();
  const columns = width >= 720 ? 2 : 1;
  return <SafeAreaView style={{ flex: 1 }}>
    <View accessibilityRole="summary" style={{ flexDirection: columns === 2 ? 'row' : 'column' }}>
      <Text maxFontSizeMultiplier={2}>Width {Math.round(width)} · font {fontScale}</Text>
    </View>
  </SafeAreaView>;
}

You should see

The layout adapts to width, safe-area insets, and larger text.

Try It Yourself

Platform and Lifecycle Warning

Assuming one simulator's happy path proves every real-device, release-build, permission, accessibility, offline, and lifecycle path.

Accessibility — React Native

What you'll walk away with

Build a Complete Mental Model

Apply It in Production React Native

After This Lesson