All the informations on the API calls can be found on the official Leapmotion website.

To access the leapmotion on a webpage, first import the libs:

<script src="leap-0.6.4.js"></script>
<script src="leap-plugins-0.1.12.js"></script>

LeapJS download link

leap plugin download link

Then we create a controller

var controller = new Leap.Controller();

and finally, create and execute the loop:

controller.on('frame', function(frame){
// instructions of your loop