Jquery Mobile open panel by sliding by starting slide from left edge

jquery.moble.panelOpenSwipe.js

(function(){
    var swiperight = null;
        
    $('body').on('touchstart vmousedown', function(e){
      if (e.pageX < 20)
        swiperight = e.pageX;
      else
        swiperight = null;
    });
    
    $('body').on('touchmove vmousemove', function(e){
    
      if (swiperight && e.pageX - swiperight > 50 )
        $('#mypanel').panel('open');
      
    });
})()