React setState
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<!DOCTYPE html> <html> <head> <meta charset="UTF-8" /> <title>React setState</title> <script src="https://unpkg.com/react@16/umd/react.development.js"></script> <script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script> <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script> </head> <body> <div id="member"></div> <script type="text/babel"> class Member extends React.Component { constructor(props) { super(props); this.state = { name: "Bùi Văn Tèo", age: 25 }; }; changeName = () => { this.setState({ name: "Bùi Văn Tý", age: 27 }) }; render() { return ( <div> <h2>{this.state.name}</h2> <p>Tuổi: {this.state.age}</p> <button type="button" onClick={this.changeName}>Change name</button> </div> ); }; }; ReactDOM.render( <Member />, document.getElementById('member') ); </script> </body> </html>