React-1
JavaScript
// write code here and click the execute button
class Button extends React.Component {
constructor(props){
super(props);
this.state = { counter:10};
console.log(props);
}
handleClick = () => {
this.setState({counter:this.state.counter+1})
}
render() {
return (
<button onClick = {this.handleClick}> {this.state.counter} </button>
)}
}
ReactDOM.render(<Button />,mountNode);