import React, { Component } from 'react'; class App extends Component { constructor(props) { super(props); this.sayHello = this.sayHello.bind(this); } sayHello() { alert('Hello!'); } return ( <button onClick={this.sayHello}> Click me! </button> ); } export default App;
//Event hadling in react function ActionLink() { function handleClick(e) { e.preventDefault(); console.log('The link was clicked.'); } return ( <a href="#" onClick={handleClick}> Click me </a> ); }
<button onClick={sayHello}>Click</button>