Javascript - 可以检查间隔是否已经设置? [英] Javascript - Possible to check if an interval is already set?

问题描述

我有一个使用间隔每 5 秒弹跳一次的 div.

I have a div that is bouncing every 5 seconds using an interval.

滚动到页面底部时，这个div淡出，间隔清零.

When scrolling to the bottom of the page, this div fades out and the interval is cleared.

但是，我认为间隔被多次创建并且自身重叠存在问题.

However, I think there is an issue with the interval being created multiple times and overlaps upon itself.

有没有办法检查是否设置了间隔，如果设置了，清除它，如果没有，设置它?

Is there a way to check if an interval is set, and if so clear it, and if not, to set it?

之所以需要清除interval，是因为jquery的弹跳效果导致div即使隐藏了也会再次出现.

The reason I need to clear the interval is because the bounce effect of jquery causes the div to appear again even if it's hidden.

JSBIN:http://jsbin.com/ijuhok/4/

推荐答案

您需要覆盖现有的间隔，以便您可以从任何地方清除它:http://jsbin.com/ijuhok/5/.

You need to overwrite the existing interval so that you can clear it from everywhere: http://jsbin.com/ijuhok/5/.

$j("#more").fadeIn('slow',function(){
    ResInterval = window.setInterval(bounceMore, 5000);
    // no "var"
});

您可以消除 window 的 $(document).ready 因为它始终可用.

You can eliminate $(document).ready for window because it's always available.

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