Angular: Empty Fiddle

http://angularjs.org/

HTML

<script src="http://code.angularjs.org/angular-1.0.1.js"></script>
<div ng-controller="myAppCtrl">
    <button data-emptywidget="#panel2" ng-click="events.btnLoadMore($event)">Click</button>
</div>

JavaScript

var app = angular.module('myApp', []);

app.controller("myAppCtrl", function($scope, $attrs) {
    $scope.events = {}
    $scope.events.btnLoadMore = function($event) {
        console.log($event);
        var panel = angular.element($event.target).attr("data-emptywidget");
        console.log(panel);
    }
});