Edit in JSFiddle

class Hello extends React.Component {
  onClickDemo() {
  	console.log('clicked');
  };
  onKeyDownDemo(event) {
  	if (event.key === 'Enter') {
  		console.log('enter key pressed on keydown of div');
  	}
  }
  render() {	
    return (
    <div>
      <div role="button" tabIndex="0" onClick={this.onClickDemo} onKeyDown={this.onKeyDownDemo} className="fakeButtonStyle">Fake Button</div>
      <button onClick={this.onClickDemo} className="realButtonStyle">Real Button</button>
    </div>
    );
  }
}

ReactDOM.render(
  <Hello name="World" />,
  document.getElementById('container')
);

.fakeButtonStyle {
  background-color: #1976d2;
  color: #fff;
  width: 125px;
  height: 25px;
  font-size: 20px;
  line-height: 25px;
  padding: 10px;
  text-align: center;
  border-radius: 5px;

  margin-bottom: 20px;
}

.fakeButtonStyle:hover {
  cursor: default;
}
.fakeButtonStyle:hover,
.realButtonStyle:hover {
  background-color: rgb(17, 82, 147);
}

.realButtonStyle {
  background-color: #1976d2;
  color: #fff;
  width: 125px;
  min-height: 25px;
  font-size: 20px;
  padding: 10px;
  border-radius: 5px;
}