如何检查DOM中是否包含jQuery元素? [英] How do I check whether a jQuery element is in the DOM?

问题描述

假设我定义了一个元素

$foo = $('#foo');

然后我打电话

$foo.remove()

从某个事件开始.我的问题是，如何检查$ foo是否已从DOM中删除?我发现$foo.is(':hidden')可以工作，但是如果我仅调用$foo.hide()，那当然也将返回true.

from some event. My question is, how do I check whether $foo has been removed from the DOM or not? I've found that $foo.is(':hidden') works, but that would of course also return true if I merely called $foo.hide().

推荐答案

像这样:

if (!jQuery.contains(document, $foo[0])) {
    //Element is detached
}

如果元素的父元素之一被删除(在这种情况下，元素本身仍将具有父元素)，这仍然会起作用.

This will still work if one of the element's parents was removed (in which case the element itself will still have a parent).

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