Function removeNodeRange

06.Router/basic/js/vue.js:1501–1519

* Remove a range of nodes with transition, store * the nodes in a fragment with correct ordering, * and call callback when done. * * @param {Node} start * @param {Node} end * @param {Vue} vm * @param {DocumentFragment} frag * @param {Function} cb

(start, end, vm, frag, cb)

   */

  function removeNodeRange(start, end, vm, frag, cb) {
    var done = false;
    var removed = 0;
    var nodes = [];
    mapNodeRange(start, end, function (node) {
      if (node === end) done = true;
      nodes.push(node);
      removeWithTransition(node, vm, onRemoved);
    });
    function onRemoved() {
      removed++;
      if (done && removed >= nodes.length) {
        for (var i = 0; i < nodes.length; i++) {
          frag.appendChild(nodes[i]);
        }
        cb && cb();
      }
    }
  }

  /**
   * Check if a node is a DocumentFragment.