Function commitNestedUnmounts

code/event-handlers/public/app.js:10799–10829

(root)

  }

  function commitNestedUnmounts(root) {
    // While we're inside a removed host node we don't want to call
    // removeChild on the inner nodes because they're removed by the top
    // call anyway. We also want to call componentWillUnmount on all
    // composites before this host node is removed from the tree. Therefore
    var node = root;
    while (true) {
      commitUnmount(node);
      // Visit children because they may contain more composite or host nodes.
      // Skip portals because commitUnmount() currently visits them recursively.
      if (node.child !== null && (
      // If we use mutation we drill down into portals using commitUnmount above.
      // If we don't use mutation we drill down into portals here instead.
      !mutation || node.tag !== HostPortal)) {
        node.child['return'] = node;
        node = node.child;
        continue;
      }
      if (node === root) {
        return;
      }
      while (node.sibling === null) {
        if (node['return'] === null || node['return'] === root) {
          return;
        }
        node = node['return'];
      }
      node.sibling['return'] = node['return'];
      node = node.sibling;
    }
  }

  function detachFiber(current) {
    // Cut off the return pointers to disconnect it from the tree. Ideally, we