React JS send custom parameter to onClick

If you need to send a custom parameter to your onClick event handler, do like this

<a href="" onClick={()=> {this.tabClicked("Exceptions")}}>Exceptions</a>

if you need to pass the event as well to the onClick handler use like this

<a href="" onClick={(evt)=> {this.tabClicked(evt,"Exceptions")}}>Exceptions</a>

and in your tabClicked() you can get the parameters like this

tabClicked(evt, tab) {

evt.preventDefault(); // Let's stop this event.

alert(tab); // should alert Exceptions

}