检查是否已调用clearInterval？ [英] Checking whether clearInterval has been called?

问题描述

鉴于此代码：

bob = setInterval(function, 1000);
clearInterval(bob);

现在有办法知道该间隔是否已被清除？

Is there now a way to know if that interval has been cleared?

目前，我通过取消设置' bob '来跟踪这个问题，但我很好奇我是否需要额外的代码行：

Currently, I keep track of this myself, by unsetting 'bob', but I'm curious if my extra line of code is unnecessary:

clearInterval(bob);
bob = null;
if (!bob) itIsCleared();

谢谢！

推荐答案

setInterval 的返回值只是用于传递回 clearInterval <的唯一ID / code>。它不是具有任何附加信息的结构化对象，当您调用 clearTimeout 时也不会设置为null。

The return value of setInterval is just a unique id you use to pass back to clearInterval. It's not a structured object with any additional information, nor does it get set to null when you call clearTimeout.

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