elementFromPoint

gistfile1.js

(function ($) {
  
  $.elementFromPoint = function (x, y) {
    var moved = false;
    var yo = window.pageYOffset;
    var xo = window.pageXOffset;
    var w = window.innerWidth;
    var h = window.innerHeight;

    if (yo > 0) {
      moved = (doc.elementFromPoint(0, yo + h - 1) === null);
    } else if (xo > 0) {
      moved = (doc.elementFromPoint(xo + w - 1, 0) === null);
    }

    return (moved) ?
      doc.elementFromPoint(x - xo, y - yo) :
      doc.elementFromPoint(x, y);
  }

})(Zepto);