Angular 是否有必要取消订阅 this.activatedRoute 订阅

Question

我的代码:

ngOnInit() {

  this.activatedRoute.params.subscribe((params: Params) => {
    // do stuff
  })

  this.activatedRoute.data.subscribe((data: any) => {
    // do stuff
  })

}

我的问题是......我需要在 ngOnDestroy 中取消订阅这些吗？

出于习惯，我总是取消订阅，但不确定是否有必要。

谢谢

Answer 1

不，您不需要取消订阅路由可观察对象

来自 Documentation

When subscribing to an observable in a component, you almost always arrange to unsubscribe when the component is destroyed.

There are a few exceptional observables where this is not necessary. The ActivatedRoute observables are among the exceptions.

The ActivatedRoute and its observables are insulated from the Router itself. The Router destroys a routed component when it is no longer needed and the injected ActivatedRoute dies with it.

Feel free to unsubscribe anyway. It is harmless and never a bad practice.