Function commitNestedUnmounts

docs/external/js/react-dom.development.js:20289–20324

(finishedRoot, root, renderPriorityLevel)

  }

  function commitNestedUnmounts(finishedRoot, root, renderPriorityLevel) {
    // 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
    // we do an inner loop while we're still inside the host node.
    var node = root;

    while (true) {
      commitUnmount(finishedRoot, node, renderPriorityLevel); // 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.
       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) {
    var alternate = current.alternate; // Cut off the return pointers to disconnect it from the tree. Ideally, we