Function markAsComponentHost

packages/core/src/render3/view/directives.ts:128–133

* Marks a given TNode as a component's host. This consists of: * - setting the component offset on the TNode. * - storing index of component's host element so it will be queued for view refresh during CD.

(tView: TView, hostTNode: TNode, componentOffset: number)

 * - storing index of component's host element so it will be queued for view refresh during CD.
 */
function markAsComponentHost(tView: TView, hostTNode: TNode, componentOffset: number): void {
  ngDevMode && assertFirstCreatePass(tView);
  ngDevMode && assertGreaterThan(componentOffset, -1, 'componentOffset must be great than -1');
  hostTNode.componentOffset = componentOffset;
  (tView.components ??= []).push(hostTNode.index);
}

/** Initializes the data structures necessary for a list of directives to be instantiated. */
function initializeDirectives(