Javascript touch movement, track when user swipes from edges

Question

I need to track user touch events. I want to track when user swipes from edges.
For example when user swipes from left vertical edge I will show a menu, from right edge

Answer 1

Using Hammer.js v2.0.4, I found that this worked best:

$("html").hammer().on('swiperight', function (e) {
    var endPoint = e.pointers[0].pageX;
    var distance = e.distance;
    var origin = endPoint - distance;

    if (origin <= 15) {
        // They swiped, starting from no more than 15px away from the edge. 
    }
});