Function getDeclarationView

packages/core/src/animation/utils.ts:140–143

* Resolves the view that declares the template a node belongs to. We use the * declaration view (rather than the rendered `LView` itself, which is a fresh * object on every re-render) so that the same logical insertion point compares * equal across re-renders, while distinct instances of a shared

(lView: LView | undefined)

 * unequal.
 */
function getDeclarationView(lView: LView | undefined): LView | null {
  if (!lView) return null;
  return lView[DECLARATION_VIEW] ?? lView;
}

// Tracks nodes that have scheduled leave animations but were re-inserted into the DOM
// before the animation completed, thus rescuing them from being physically removed.