preventEvent

stops the event processing and cancels its default action (called in some event handler)

Example

<a id="mylink" href='http://google.com'>Google</a>

document.getElementById("mylink").onclick = function(e)
{
    alert("The link doesn't redirect us to the Google page anymore");
    return webix.html.preventEvent(e);
 
}

If the specified event is cancelable, the method signifies that it should be cancelled. If the event can't be cancelled the method has no effect.