what does onchange do in react

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Melinda
04 Jan 2019
1import React, { Component } from 'react';
2
3import './App.css';
4import Header from './Header';
5
6class App extends Component {
7
8  constructor(props) {
9    super(props);
10   this.state = {name: "Michael"}
11
12  }
13   changeTitle = (e) =>{
14      this.setState({name: e.target.value});
15    }
16
17  render() {
18    return (
19      <div className="App">
20        <Header title={this.state.name}/>
21        <p className="App-intro">
22          Type here to change name.
23        <input type="text" onChange={this.changeTitle}/>
24        </p>
25      </div>
26    );
27  }
28}
29
30export default App;
Serena
17 Jan 2020
1In React, onChange is used to handle user input in real-time.
2
3If you want to build a form in React, you need to use this event to track 
4the value of input elements.
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