react-navigation/src/views/CardStack/Card.js

import React from 'react';
import { Animated, StyleSheet } from 'react-native';
import createPointerEventsContainer from './PointerEventsContainer';

/**
 * Component that renders the scene as card for the <NavigationCardStack />.
 */
class Card extends React.Component {
  render() {
    const { children, pointerEvents, style } = this.props;
    return (
      <Animated.View
        pointerEvents={pointerEvents}
        ref={this.props.onComponentRef}
        style={[styles.main, style]}
      >
        {children}
      </Animated.View>
    );
  }
}

const styles = StyleSheet.create({
  main: {
    backgroundColor: '#E9E9EF',
    bottom: 0,
    left: 0,
    position: 'absolute',
    right: 0,
    shadowColor: 'black',
    shadowOffset: { width: 0, height: 0 },
    shadowOpacity: 0.2,
    shadowRadius: 5,
    top: 0,
  },
});

Card = createPointerEventsContainer(Card);

export default Card;