如何确定 div 是否滚动到底部? [英] How can I determine if a div is scrolled to the bottom?

问题描述

如何在不使用 jQuery 或任何其他 JavaScript 库的情况下确定带有垂直滚动条的 div 是否一直滚动到底部?

How do I determine, without using jQuery or any other JavaScript library, if a div with a vertical scrollbar is scrolled all the way to the bottom?

我的问题不是如何滚动到底部.我知道该怎么做.我想确定 div 是否已经滚动到底部.

My question is not how to scroll to the bottom. I know how to do that. I want to determine if the the div is scrolled to the bottom already.

这不起作用:

if (objDiv.scrollTop == objDiv.scrollHeight) 

推荐答案

你已经很接近使用 scrollTop == scrollHeight.

scrollTop 指的是滚动位置的顶部，即scrollHeight - offsetHeight

scrollTop refers to the top of the scroll position, which will be scrollHeight - offsetHeight

您的 if 语句应如下所示(不要忘记使用三重等号):

Your if statement should look like so (don't forget to use triple equals):

if( obj.scrollTop === (obj.scrollHeight - obj.offsetHeight))
{
}

更正了我的答案，完全错误

Corrected my answer, was completely wrong

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