How to call stopPropagation in reactjs?

The right way is to use .stopPropagation,

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

  handleChildClick: function(e) {
    e.stopPropagation();

    console.log('handleChildClick');
  },

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

Example

Your event handlers will be passed instances of SyntheticEvent, a cross-browser wrapper around the browser's native event. It has the same interface as the browser's native event, including stopPropagation() and preventDefault(), except the events work identically across all browsers. Event System