angularjs - Adding modal when clicking a hyperlink -

i want load modal using custom directive when hyperlink clicked. thing hyperlink defined ng-click function. current ng-click function should work requirement. how can without changing ng-click function? below hyperlink.

<a href="#" class="book-btns add-to-cart" data-ng-click="service.addtocart(hotel)" >add cart & continue> </a>

href="javascript:;" should work disable default link behaviour.