Function find

Sortable.js:223–236

(ctx, tagName, iterator)

    return matrixFn && new matrixFn(appliedTransforms);
  }
  function find(ctx, tagName, iterator) {
    if (ctx) {
      var list = ctx.getElementsByTagName(tagName),
        i = 0,
        n = list.length;
      if (iterator) {
        for (; i < n; i++) {
          iterator(list[i], i);
        }
      }
      return list;
    }
    return [];
  }
  function getWindowScrollingElement() {
    var scrollingElement = document.scrollingElement;
    if (scrollingElement) {