Method destroy

packages/core/src/di/r3_injector.ts:270–295

* Destroy the injector and release references to every instance or provider associated with it. * * Also calls the `OnDestroy` lifecycle hooks of every instance that was created for which a * hook was found.

()

   * hook was found.
   */
  override destroy(): void {
    assertNotDestroyed(this);

    // Set destroyed = true first, in case lifecycle hooks re-enter destroy().
    this._destroyed = true;
    const prevConsumer = setActiveConsumer(null);
    try {
      // Call all the lifecycle hooks.
      for (const service of this._ngOnDestroyHooks) {
        service.ngOnDestroy();
      }
      const onDestroyHooks = this._onDestroyHooks;
      // Reset the _onDestroyHooks array before iterating over it to prevent hooks that unregister
      // themselves from mutating the array during iteration.
      this._onDestroyHooks = [];
      for (const hook of onDestroyHooks) {
        hook();
      }
    } finally {
      // Release all references.
      this.records.clear();
      this._ngOnDestroyHooks.clear();
      this.injectorDefTypes.clear();
      setActiveConsumer(prevConsumer);
    }
  }

  override onDestroy(callback: () => void): () => void {
    assertNotDestroyed(this);