user.service.ts:
get返回的Observable,一旦被调用subscribe后,会触发tap操作,取出user detail:
cb是callback,执行subscribe,将值泵入callback:
callback的实现:使用userId调用this.store.dispatch(new UserAction.LoadUserDetail(userId))
user.service.ts:
get返回的Observable,一旦被调用subscribe后,会触发tap操作,取出user detail:
cb是callback,执行subscribe,将值泵入callback:
callback的实现:使用userId调用this.store.dispatch(new UserAction.LoadUserDetail(userId))