react-native-web/docs/apis/Platform.md

Platform

Detect what is the platform in which the app is running. This piece of functionality can be useful when only small parts of a component are platform specific.

Properties

OS: string

Platform.OS will be web when running in a Web browser.

import { Platform } from 'react-native';

const styles = StyleSheet.create({
  height: (Platform.OS === 'web') ? 200 : 100,
});

Methods

select: any

Platform.select takes an object containing Platform.OS as keys and returns the value for the platform you are currently running on.

import { Platform } from 'react-native';

const containerStyles = {
  flex: 1,
  ...Platform.select({
    android: {
      backgroundColor: 'blue'
    },
    ios: {
      backgroundColor: 'red'
    },
    web: {
      backgroundColor: 'green'
    }
  })
});