Open sidebar when when user swipes from edges with Hammer.js

In my website I'm using hammer.js to open sidebar menu on swipe left. I've written this code and it's working:

Hammer(document.getElementById("page-content-wrapper")).on("swiperight", function() {
  wrapper.addClass("toggled");
});

But I want to open the sidebar when user swipe left from the left edge of the screen. I've tried these answers - Javascript touch movement, track when user swipes from edges but it didn't work. Any idea how can I implement this? Thanks.