Responsive Fontsize

By Omkar Lubal

Published in Text

June 29, 2022

1 min read

Introduction

Library to help with responsive font size for varying sizes of display.🎉

How to install

yarn add react-native-responsive-fontsize

npm install react-native-responsive-fontsize --save

Examples on different device sizes

iPhone SE	iPhone X

Methods

	arguments	Description
RFPercentage	percent: number	The font size is calculated as a percentage of the height(`width` in landscape mode) of the device.
RFValue	value: number, standardScreenHeight?: number	The font size is calculated based on standardScreenHeight and passed value

when using RFValue’s standardScreenHeight
- default standardScreenHeight is 680
- In landscape mode, please pass the screen width

Usage

import { RFPercentage, RFValue } from "react-native-responsive-fontsize";

const styles = StyleSheet.create({
  welcome: {
    fontSize: RFValue(24, 580) // second argument is standardScreenHeight(optional),
    textAlign: "center",
    margin: 10,
  },
  instructions: {
    textAlign: "center",
    color: "#333333",
    marginBottom: 5,
    fontSize: RFPercentage(5),
  },
});