# Is something covering another element?

**URL:** <https://forum.kirupa.com/t/is-something-covering-another-element/301990>\
**Category:** web dev\
**Created:** [December 18, 2009, 8:29pm UTC](https://forum.kirupa.com/t/is-something-covering-another-element/301990 "2009-12-18T20:29:12Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![NeoDreamer](https://avatars.discourse-cdn.com/v4/letter/n/ccd318/32.png) [@NeoDreamer](https://forum.kirupa.com/u/NeoDreamer)\
**Post date:** [December 18, 2009, 8:29pm UTC](https://forum.kirupa.com/t/is-something-covering-another-element/301990/1 "2009-12-18T20:29:12Z")

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Is there a way to check if there exist any absolutely positioned elements on the page that are covering an important element? I know the easiest way is to just scrape the entire DOM and check if its z-index is higher and if it’s position and dimensions are just right for blocking the important element. But isn’t that an extremely slow algorithm?