Bind in constructor - react

bind-in-constructor-react.js

class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = { message: "Hello World!" };
    this.logMessage = this.logMessage.bind(this);
  }

  logMessage = () => {
    console.log(this.state.message);
  }

  render() {
    return (
      <div className="App">
        <input
          type="button"
          value="Show message"
          onClick={this.logMessage}
        />
      </div>
    );
  }
}