Select Page

Document.elementFromPoint

David Walsh
Published: December 30, 2022

Reacting to events with JavaScript is the foundation of a dynamic experiences on the web. Whether it’s a click event or another typical action, responding to that action is important. We started with assigning events to specific elements, then moved to event delegation for efficiency, but did you know you can identify elements by position on the page? Let’s look at document.elementFromPoint and document.elementsFromPoint.

The document.elementFromPoint method accepts x and y parameters to identify the top-most element at a point:

const element = document.elementFromPoint(100, 100);
// 

If you want to know the entire element stack, you can use document.elementsFromPoint:

const elements = document.elementFromPoint(100, 100);
// [
, , ]

The elementFromPoint and elementsFromPoint are really helpful for experiences where developers don’t want to assign individual events. Games and entertainment sites could benefit from these functions. How would you use them?

  • Detect DOM Node Insertions with JavaScript and CSS Animations
  • Responsive and Infinitely Scalable JS Animations

    Back in late 2012 it was not easy to find open source projects using requestAnimationFrame() – this is the hook that allows Javascript code to synchronize with a web browser’s native paint loop. Animations using this method can run at 60 fps and deliver fantastic…

  • Editable Content Using MooTools 1.2, PHP, and MySQL

    Everybody and their aerobics instructor wants to be able to edit their own website these days. And why wouldn’t they? I mean, they have a $500 budget, no HTML/CSS experience, and extraordinary expectations. Enough ranting though. Having a website that allows for…

  • Create a Download Package Using MooTools Moousture

    Zohaib Sibt-e-Hassan recently released a great mouse gestures library for MooTools called Moousture. Moousture allows you to trigger functionality by moving your mouse in specified custom patterns. Too illustrate Moousture’s value, I’ve created an image download builder using Mooustures and PHP. The XHTML We provide…



Source: davidwalsh.name