es6_anon_method.js

class ButtonComponent extends React.Component { 
  constructor(props) { 
    super(props) 
    this.state = {
      message: 'Invoked from inside an anonymous function!', 
    } 
  } 
 
  handleClick() { 
    console.log(this.state.message)
  } 

  render() { 
    return 
      < button onClick={() => this.handleClick()} /> 
  }
}