To change a state continuously after a certain amount of time is required in a few cases for the toggling. First, make a function that is responsible for changing the state of the component. Then call the function from the constructor method for the first time. Use the set interval method inside the function to change the state after a fixed amount of time. setInterval method takes two parameter callback and time. The callback function is called again and again after that given amount of time. Use the setState method to change the state of the component.
timing(){
setInterval(() => {
this.setState({
stateName : new-state-value
})
}, time)
}
Example 1: This example illustrates how to change the state continuously after a certain amount of time.
index.js:
Javascript
import React from 'react'import ReactDOM from 'react-dom'import App from './App' ReactDOM.render(<App />, document.querySelector('#root')) |
App.js:
Javascript
import React, { Component } from 'react' class App extends Component { constructor(props){ super(props) this.state = {Number : 0} this.makeTimer() } makeTimer(){ setInterval(() => { let rand = Math.floor(Math.random() * 10) + 1 this.setState({number: rand}) }, 1000) } render(){ return ( <div> <h1> Random Number : {this.state.number} </h1> </div> ) } } export default App |
Output:
Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, neveropen Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!
