import React from "react";import { StyleSheet, Text, View } from "react-native";const App = () => (
  <View style={styles.container}>
    <Text style={styles.row}>React</Text>
  </View>);const styles = StyleSheet.create({
  container: {
    ...StyleSheet.absoluteFill, /*==(position: 'absolute', left: 0, right: 0, top: 0, bottom: 0)*/
    flex: 1,
    padding: 24
  },
  row: {
    padding: 4,
    borderBottomColor: "red",
    borderBottomWidth: StyleSheet.hairlineWidth
    /* thin line */
  }});export default App;