useWindowDimensions - Amazon Vega Docs

useWindowDimensions automatically updates all of its values when screen size or font scale changes.

import {useWindowDimensions} from 'react-native';

The following snippet show how to get your app’ window width and height like so:

const {height, width} = useWindowDimensions();

Example

import React from 'react';
import {View, StyleSheet, Text, useWindowDimensions} from 'react-native';

const App = () => {
  const {height, width, scale, fontScale} = useWindowDimensions();
  return (
    <View style={styles.container}>
      <Text style={styles.header}>Window Dimension Data</Text>
      <Text>Height: {height}</Text>
      <Text>Width: {width}</Text>
      <Text>Font scale: {fontScale}</Text>
      <Text>Pixel ratio: {scale}</Text>
    </View>
  );
};
const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
  },
  header: {
    fontSize: 20,
    marginBottom: 12,
  },
});

export default App;

Properties

fontScale

useWindowDimensions().fontScale;

The scale of the font currently used. Some operating systems allow users to scale their font sizes larger or smaller for reading comfort. This property will let you know what is in effect.

height

useWindowDimensions().height;

The height in pixels of the window or screen your app occupies.

scale

useWindowDimensions().scale;

The pixel ratio of the device your app is running on. The values can be:

1 which indicates that one point equals one pixel (usually PPI/DPI of 96, 76 on some platforms).
2 or 3 which indicates a Retina or high DPI display.

width

useWindowDimensions().width;

The width in pixels of the window or screen your app occupies.

​Example

​Properties

​fontScale

​height

​scale

​width