Function isDeferBlock

packages/core/src/defer/utils.ts:173–183

(tView: TView, tNode: TNode)

 * Whether a given TNode represents a defer block.
 */
export function isDeferBlock(tView: TView, tNode: TNode): boolean {
  let tDetails: TDeferBlockDetails | null = null;
  const slotIndex = getDeferBlockDataIndex(tNode.index);
  // Check if a slot index is in the reasonable range.
  // Note: we do `-1` on the right border, since defer block details are stored
  // in the `n+1` slot, see `getDeferBlockDataIndex` for more info.
  if (HEADER_OFFSET < slotIndex && slotIndex < tView.bindingStartIndex) {
    tDetails = getTDeferBlockDetails(tView, tNode);
  }
  return !!tDetails && isTDeferBlockDetails(tDetails);
}

/**
 * Tracks debugging information about a trigger.