In this article, we will learn how to use Imperative updates using React Spring. React spring is an animation library that makes animating UI elements simple. It is based on spring physics which helps it to achieve a natural look and feel. It is different from other animation libraries where someone has to deal with curves, easing, and time durations, all of which are in sync with each other.
Platforms: React spring is a cross-platform library, it supports react, react-native, web, and many more platforms. It also has support for all browsers.
Imperative Updates: Imperative updates can use to set the default prop to true.
Syntax:
useSpring({
from: { x: ... },
to: async animate => {
// The `config` prop below is inherited by
// both objects in the `to` array.
await animate({
to: [{ x: ... }, { x: ... }],
config: { tension: ... },
})
},
})
Steps to create an app in react.
Step 1: Create a new application using the following command.
npx create-react-app reactspringdemo
Step 2: Now move the created project folder using the following command.
cd reactspringdemo
Step 3: Install the react spring library.
npm install react-spring
Project structure: Import the app folder into the application and after that, the structure will look like this.
Example1: In the below code, we will make use of the above syntax to demonstrate the use of the Imperative updates.
GFG.jsx
Javascript
import React from 'react'; import { useSpring, animated } from 'react-spring' function OnRest() { const styles = useSpring({ from: { x: 0 }, to: async animate => { // The `config` prop below is inherited by // both objects in the `to` array. await animate({ to: [{ x: 100 }, { x: 0 }], config: { tension: 100 }, }) }, }) return ( <animated.div style={{ width: 80, margin: 221, height: 80, backgroundColor: 'green', borderRadius: 16, ...styles, }} /> ) } export default OnRest; |
App.js
Javascript
import React from 'react'import GFG from './GFG' function App() { console.log('hello') return ( <> <GFG /> </> ); } export default App; |
Step to run the Application: Open the terminal and type the following command.
npm start
Output:
Example2: In the below code, we will make use of the above syntax to demonstrate the use of the Imperative updates. In this example, we have removed the tension.
GFG.jsx
Javascript
import React from 'react'; import { useSpring, animated } from 'react-spring' function GfG() { const styles = useSpring({ from: { x: 0 }, to: async animate => { // The `config` prop below is inherited by // both objects in the `to` array. await animate({ to: [{ x: 0 }, { y: 500 }], }) }, }) return ( <animated.div style={{ width: 80, height: 80, backgroundColor: 'green', borderRadius: 50, boxShadow: 'rgb(0,0,0,0.44) 0px 5px 5px', display: 'flex', alignItems: 'center', justifyContent: 'center', color: 'green', margin: 250, ...styles, }} /> ) } export default GfG; |
App.js
Javascript
import React from 'react'import GFG from './GFG' function App() { console.log('hello') return ( <> <GFG /> </> ); } export default App; |
Step to run the application: Open the terminal and type the following command.
npm start
Output:
Reference: https://react-spring.dev/common/props#imperative-updates
