Function createContainerRef

packages/core/src/linker/view_container_ref.ts:669–691

(
  hostTNode: TElementNode | TContainerNode | TElementContainerNode,
  hostLView: LView,
)

 * @returns The ViewContainerRef instance to use
 */
export function createContainerRef(
  hostTNode: TElementNode | TContainerNode | TElementContainerNode,
  hostLView: LView,
): ViewContainerRef {
  ngDevMode && assertTNodeType(hostTNode, TNodeType.AnyContainer | TNodeType.AnyRNode);

  let lContainer: LContainer;
  const slotValue = hostLView[hostTNode.index];
  if (isLContainer(slotValue)) {
    // If the host is a container, we don't need to create a new LContainer
    lContainer = slotValue;
  } else {
    // An LContainer anchor can not be `null`, but we set it here temporarily
    // and update to the actual value later in this function (see
    // `_locateOrCreateAnchorNode`).
    lContainer = createLContainer(slotValue, hostLView, null!, hostTNode);
    hostLView[hostTNode.index] = lContainer;
    addToEndOfViewTree(hostLView, lContainer);
  }
  _locateOrCreateAnchorNode(lContainer, hostLView, hostTNode, slotValue);

  return new R3ViewContainerRef(lContainer, hostTNode, hostLView);
}

/**
 * Creates and inserts a comment node that acts as an anchor for a view container.