在删除元素之前是否需要删除事件侦听器？ [英] Do I need to remove event listeners before removing elements?

问题描述

如果我的子元素包含绑定了事件监听器的子元素，那么在清除父级之前是否需要删除这些事件监听器？ （即 parent.innerHTML =''; ）如果事件侦听器从DOM中删除，如果从DOM中删除它，是否会出现内存泄漏？

If I have a parent element with children who have event listeners bound to them, do I need to remove those event listeners before I clear the parent? (i.e., parent.innerHTML = '';) Could there be memory leaks if event listeners are not unbound from an element if it's removed from the DOM?

推荐答案

简答：是

答案很长：大多数浏览器正确处理此问题并自行删除这些处理程序。有些旧的浏览器（IE 6和7，如果我没记错的话）正在弄乱这个。是的，可能存在内存泄漏。你不应该担心这个，但你需要。请查看此文档。

Long answer: Most browsers handle this correctly and remove those handlers themselves. There are some older browsers (IE 6 and 7, if i recall correctly) that are messing this up. Yes, there could be memory leaks. You should not have to worry about this, but you need to. Have a look at this document.

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