How can I find whether there are any elements at a certain position?

问题

I have a collection of divs with the same class at various positions on a larger div. Is there a way, using jQuery, to determine if any divs are overlapping a given position on the screen?

回答1:

Read the section on document.elementFromPoint(): http://www.quirksmode.org/blog/archives/2010/06/more_ie9_goodne.html

You can use this to find the "top-most" element at that location. Hide that element, then ask again. If you get another hit, then the 2 divs overlap at that position.

回答2:

You could do this using the offset() method of JQuery, but the only way to be accurate is to get the offset of every element in the document -- not likely to perform well.

来源：https://stackoverflow.com/questions/5476468/how-can-i-find-whether-there-are-any-elements-at-a-certain-position