Function insertView

packages/core/src/render3/view/container.ts:194–229

* Inserts a view into a container. * * This adds the view to the container's array of active views in the correct * position. It also adds the view's elements to the DOM if the container isn't a * root node of another view (in that case, the view's elements will be added when * the container's

(tView: TView, lView: LView, lContainer: LContainer, index: number)

 * @param index Which index in the container to insert the child view into
 */
function insertView(tView: TView, lView: LView, lContainer: LContainer, index: number) {
  ngDevMode && assertLView(lView);
  ngDevMode && assertLContainer(lContainer);
  const indexInContainer = CONTAINER_HEADER_OFFSET + index;
  const containerLength = lContainer.length;

  if (index > 0) {
    // This is a new view, we need to add it to the children.
    lContainer[indexInContainer - 1][NEXT] = lView;
  }
  if (index < containerLength - CONTAINER_HEADER_OFFSET) {
    lView[NEXT] = lContainer[indexInContainer];
    addToArray(lContainer, CONTAINER_HEADER_OFFSET + index, lView);
  } else {
    lContainer.push(lView);
    lView[NEXT] = null;
  }

  lView[PARENT] = lContainer;

  // track views where declaration and insertion points are different
  const declarationLContainer = lView[DECLARATION_LCONTAINER];
  if (declarationLContainer !== null && lContainer !== declarationLContainer) {
    trackMovedView(declarationLContainer, lView);
  }

  // notify query that a new view has been added
  const lQueries = lView[QUERIES];
  if (lQueries !== null) {
    lQueries.insertView(tView);
  }

  updateAncestorTraversalFlagsOnAttach(lView);
  // Sets the attached flag
  lView[FLAGS] |= LViewFlags.Attached;
}

/**
 * Track views created from the declaration container (TemplateRef) and inserted into a