Function executeOnDestroys

packages/core/src/render3/node_manipulation.ts:438–472

Calls onDestroy hooks for this view

(tView: TView, lView: LView)

/** Calls onDestroy hooks for this view */
function executeOnDestroys(tView: TView, lView: LView): void {
  ngDevMode && assertNotReactive(executeOnDestroys.name);
  let destroyHooks: DestroyHookData | null;

  if (tView != null && (destroyHooks = tView.destroyHooks) != null) {
    for (let i = 0; i < destroyHooks.length; i += 2) {
      const context = lView[destroyHooks[i] as number];

      // Only call the destroy hook if the context has been requested.
      if (!(context instanceof NodeInjectorFactory)) {
        const toCall = destroyHooks[i + 1] as HookFn | HookData;

        if (Array.isArray(toCall)) {
          for (let j = 0; j < toCall.length; j += 2) {
            const callContext = context[toCall[j] as number];
            const hook = toCall[j + 1] as HookFn;
            profiler(ProfilerEvent.LifecycleHookStart, callContext, hook);
            try {
              hook.call(callContext);
            } finally {
              profiler(ProfilerEvent.LifecycleHookEnd, callContext, hook);
            }
          }
        } else {
          profiler(ProfilerEvent.LifecycleHookStart, context, toCall);
          try {
            toCall.call(context);
          } finally {
            profiler(ProfilerEvent.LifecycleHookEnd, context, toCall);
          }
        }
      }
    }
  }
}

/**
 * Returns a native element if a node can be inserted into the given parent.