Chrome 77 Bug With requestAnimationFrame()

Published Oct 3, 2019 by in:

If two <IFRAME> embeds a requestAnimationFrame() animation, they both go at double rate in Chrome 77, if displayed simultaneously.

Go to www.testufo.com/refreshrate as a standalone page, and it will work correctly in Chrome in a tab by itself.

However, when they’re embedded twice, you get double the callbacks = double the refresh rate.