Function cleanup

packages/core/src/render3/reactivity/effect.ts:235–251

(this: EffectNode)

    },

    cleanup(this: EffectNode): void {
      if (!this.cleanupFns?.length) {
        return;
      }
      const prevConsumer = setActiveConsumer(null);
      try {
        // Attempt to run the cleanup functions. Regardless of failure or success, we consider
        // cleanup "completed" and clear the list for the next run of the effect. Note that an error
        // from the cleanup function will still crash the current run of the effect.
        while (this.cleanupFns.length) {
          this.cleanupFns.pop()!();
        }
      } finally {
        this.cleanupFns = [];
        setActiveConsumer(prevConsumer);
      }
    },
  }))();

export const ROOT_EFFECT_NODE: Omit<RootEffectNode, 'fn' | 'scheduler' | 'notifier' | 'injector'> =