font size in react native code example

Example 1: react native scaling font

<Text
    numberOfLines={1}// add this
    adjustsFontSizeToFit// add this
    style={{textAlign:'center',fontSize:30}}
  >

Example 2: text size react native

fontSize: 24

Example 3: color text react native

// Some code....
<Text 
	// Topic 2: Text Style
	style={styles.headline}>Hi, Lunox!
</Text>

// Some code....

headline: {
	color: 'white', // <-- The magic
	textAlign: 'center', // <-- The magic
	fontWeight: 'bold',
	fontSize: 50,
	backgroundColor: 'purple',
}
// Some code....

Look how I use it here:
https://github.com/Lunox-code/100dayscode-react.native/blob/master/App.js

Example 4: change text size according to screen react native

import { Dimensions, Platform, PixelRatio } from 'react-native';

const {
       width: SCREEN_WIDTH,
       height: SCREEN_HEIGHT,
     } = Dimensions.get('window');

     // based on iphone 5s's scale
     const scale = SCREEN_WIDTH / 320   ;

  export function actuatedNormalize(size) {
  const newSize = size * scale 
   if (Platform.OS === 'ios') {
    return Math.round(PixelRatio.roundToNearestPixel(newSize))
   } else {
     return Math.round(PixelRatio.roundToNearestPixel(newSize)) - 2
   }
  }

Example 5: react native font based on viewport dimensions

<View>
  <Text
    numberOfLines={1}
    adjustsFontSizeToFit
    style={{textAlign:'center',fontSize:30}}
  >
    {this.props.email}
  </Text>
</View>