javascript - React - Prevent Event Trigger on Parent From Child

Question

I have this scenario, where when parent element is clicked, it flips to show a child element with different colours. Unfortunately, when the user clicks on one of the colours, the 'click' event on parent is also triggered.

How can I stop the event trigger on parent when the child is clicked?

Possible solutions I am wondering:

1. CSS?
   Append pointer-events : none class to the parent when the child is clicked. However, this would mean that the parent will need to be cleansed of the pointer-events class later.

2. Using Ref?
   Record the ref of the parent React element & upon click on the child, compare the event.target against the ref? I don't like this because I don't like the global ref.

Thoughts and the better solution would be much appreciated. The question is: How can I stop the event trigger on parent when the child is clicked?

Answer 1

You can use stopPropagation

stopPropagation - Prevents further propagation of the current event in the bubbling phase

var App = React.createClass({
  handleParentClick: function (e) { 
    console.log('parent');
  },

  handleChildClick: function (e) {
    e.stopPropagation();
    console.log('child');
  },

  render: function() {
    return <div>
      <p onClick={this.handleParentClick}>
        <span onClick={this.handleChildClick}>Click</span>
      </p>
    </div>;
  }
});

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

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<div id="root"></div>