Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

JavaScript

Is this the preferred way to do animations and transitions?

So I have some transitions I’d like to apply when a user scrolls an element into the viewport.

My plan is to grab the bounding corrdinates, find the element’s inner width, and test if the corrdinates match.

If true, add the class for the changes.

I’m a bit stumped on how I’d add the class though. Would changing the opacity in a class and then using ClassList.add(class) be enough to make it change?