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Adjustable Font Sizes In React Native - Innovationm Blog

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  • Question: react native responsive font size
  • Time: Updated 41 minute ago
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react native responsive font size

In React Native, you can make your font sizes responsive by using the Dimensions API and calculating the font size based on the device screen size. Here’s an example of how to do this:

php
import { Dimensions } from 'react-native'; const { width } = Dimensions.get('window'); const baseFontSize = 16; const responsiveFontSize = (fontSize) => { const scale = width / 375; const newSize = fontSize * scale; return Math.round(newSize); }; // Usage example const styles = StyleSheet.create({ title: { fontSize: responsiveFontSize(24), }, subtitle: { fontSize: responsiveFontSize(18), }, });

In the above code, we first get the device screen width using the Dimensions API. We also define a baseFontSize value which is the default font size that we want to use as a baseline for scaling.

Next, we define a responsiveFontSize function that takes a font size value and calculates a new font size based on the device screen width. We use a scale factor that is calculated by dividing the device screen width by a reference width of 375. This means that the font size will be scaled proportionally to the device screen width assuming a reference width of 375.

Finally, we use the responsiveFontSize function to set the font size for our styles. This ensures that the font sizes are scaled proportionally based on the device screen size.

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React-Native-Responsive-Fontsize - Npm
React-Native-Responsive-Fontsize – Npm
React-Native-Responsive-Fontsize - Npm
React-Native-Responsive-Fontsize – Npm
Github - Heyman333/React-Native-Responsive-Fontsize: ???? Responsive Fontsize  Based On Screen-Size Of The Device In React-Native
Github – Heyman333/React-Native-Responsive-Fontsize: ???? Responsive Fontsize Based On Screen-Size Of The Device In React-Native
Adjustable Font Sizes In React Native - Innovationm Blog
Adjustable Font Sizes In React Native – Innovationm Blog
React-Native-Responsive-Fontsize - Npm
React-Native-Responsive-Fontsize – Npm

react-native-responsive-screen

react-native-responsive-screen is a package for React Native that provides an easy way to create responsive UIs for different screen sizes and devices. It helps to create a UI that can fit on different screen sizes without any distortion or need for manual adjustments.

This package provides a set of functions that allow you to define dimensions (e.g., height, width, font size) in a way that is relative to the screen size. For example, instead of setting a fixed height for a component, you can use a function from react-native-responsive-screen to define the height based on the screen size.

The package provides four main functions:

  • widthPercentageToDP – Converts width percentage to responsive screen width
  • heightPercentageToDP – Converts height percentage to responsive screen height
  • fontSizePercentageToDP – Converts font size percentage to responsive font size
  • screenWidth – Returns the width of the screen

Here is an example of how to use react-native-responsive-screen to create a responsive UI:

javascript
import { StyleSheet } from 'react-native'; import { heightPercentageToDP as hp, widthPercentageToDP as wp } from 'react-native-responsive-screen'; const styles = StyleSheet.create({ container: { height: hp('50%'), width: wp('80%'), justifyContent: 'center', alignItems: 'center', }, text: { fontSize: wp('5%'), }, });

In the above example, hp and wp are functions that convert the height and width percentages to responsive screen size. Using these functions, you can define styles that will automatically adjust to different screen sizes.

Auto resize text React Native

To auto resize text in React Native, you can use the Text component’s adjustsFontSizeToFit prop, which will automatically reduce the font size of the text until it fits within its container.

Here’s an example:

jsx
import React from 'react'; import { View, Text } from 'react-native'; const App = () => { return ( <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}> <Text adjustsFontSizeToFit numberOfLines={1}> This is some auto resized text </Text> </View> ); }; export default App;

In the example above, the Text component is set to automatically adjust its font size to fit within its container using the adjustsFontSizeToFit prop. The numberOfLines prop is also set to 1, which limits the text to a single line.

You can further customize the behavior of the adjustsFontSizeToFit prop using the minimumFontScale and allowFontScaling props. minimumFontScale sets the minimum scale factor for the font size, and allowFontScaling determines whether the font size can be scaled up in addition to being scaled down.

jsx
<Text adjustsFontSizeToFit minimumFontScale={0.5} allowFontScaling={false} > This is some auto resized text </Text>

In the example above, the minimumFontScale prop is set to 0.5, which means that the font size can be scaled down to half of its original size. The allowFontScaling prop is set to false, which means that the font size cannot be scaled up beyond its original size.

You can see some more information related to react native responsive font size here

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