如何调试可观察者是否取消订阅 [英] How to debug on whether observable is unsubscribe

问题描述

如何在订阅后测试可观察对象是否已取消订阅. 我正在使用ionic2/angular2开发.

how can i test whether the observable is unsubscribe after subscription. I am developing in ionic2/angular2.

我希望在chrome开发人员模式下输入类似这样的内容，它将返回值: observableName.isSubscribe()

I am expecting typing something like this in chrome developer mode and it will return value: observableName.isSubscribe()

推荐答案

您可以订阅并检查封闭参数.

You can have a subscription and check closed parameter.

let subscription = observable.subscribe(() => {})

if (!subscription.closed) {
  //subscribed
} else {
  //not subscribed
}

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