/Javascript/React/Reactjs lifecycle class components

Reactjs lifecycle class components

import React from 'react';
import ReactDOM from 'react-dom';
 
class Test extends React.Component {
    constructor(props)
    {
        super(props);
        this.state = { hello : "World!" };
    }
 
    componentWillMount()
    {
        console.log("componentWillMount()");
    }
 
    componentDidMount()
    {
        console.log("componentDidMount()");
    }
 
    changeState()
    {
        this.setState({ hello : "Geek!" });
    }
 
    render()
    {
        return (
            <div>
            <h1>GeeksForGeeks.org, Hello{ this.state.hello }</h1>
            <h2>
            <a onClick={this.changeState.bind(this)}>Press Here!</a>
            </h2>
            </div>);
    }
 
    shouldComponentUpdate(nextProps, nextState)
    {
        console.log("shouldComponentUpdate()");
        return true;
    }
 
    componentWillUpdate()
    {
        console.log("componentWillUpdate()");
    }
 
    componentDidUpdate()
    {
        console.log("componentDidUpdate()");
    }
}
 
ReactDOM.render(
    <Test />,
    document.getElementById('root'));

Source: geeksforgeeks.org

Similar codes

0 vote168 views1 answer
Font awesome react share faShare
Javascript React
5 votes151 views2 answers
What hostings can run react js
Javascript React
0 vote165 views1 answer
Dropzone react view photo
Javascript React
0 vote155 views1 answer
React native making bigger hitbox
Javascript React
0 vote167 views1 answer
React 1 to 10 with step 2 (odd numbers)
Javascript React
2 votes162 views1 answer
React native open email client
Javascript React
31 votes159 views1 answer
React router dom npm
Javascript React
5 votes177 views2 answers
React onclick new tab
Javascript React
0 vote143 views1 answer
React input value set state on change
Javascript React
3 votes185 views2 answers
Use onchange with react select
Javascript React