[React] Normalize Events with Reacts Synthetic Event System

class App extends React.Component {
  constructor(){
    super();
    this.state = {currentEvent: ‘---‘}
    this.update = this.update.bind(this)
  }
  update(e){
    this.setState({currentEvent: e.type})
  }
  render(){
    return (
      <div>
        <textarea
          onKeyPress={this.update}
          onCopy={this.update}
          onCut={this.update}
          onPaste={this.update}
          onFocus={this.update}
          onBlur={this.update}
          onDoubleClick={this.update}
          onTouchStart={this.update}
          onTouchMove={this.update}
          onTouchEnd={this.update}
          cols="30"
          rows="10" />
        <h1>{this.state.currentEvent}</h1>
      </div>
    )
  }
}

ReactDOM.render(
  <App />,
  document.getElementById(‘root‘)
);