Function clone

modular/sortable.core.esm.js:495–505

(el)

  el.scrollTop += y;
}
function clone(el) {
  var Polymer = window.Polymer;
  var $ = window.jQuery || window.Zepto;
  if (Polymer && Polymer.dom) {
    return Polymer.dom(el).cloneNode(true);
  } else if ($) {
    return $(el).clone(true)[0];
  } else {
    return el.cloneNode(true);
  }
}
function setRect(el, rect) {
  css(el, 'position', 'absolute');
  css(el, 'top', rect.top);