I am having a problem with the bootstrap modal as well. The open modal budget is on the widget, but when I click nothing happens. I've tried using the <a href...> as well the bootstrap button with data-toggle, but neither works. I attached the widget and html files below.
var z = this.map.getZoom();
z += (z/10);
z = Math.round(z);
this.map.setZoom(z);
This worked, sorry for bugging you.