The plain-English version
A browser scheduling API that requests a callback around a future rendering opportunity.
Why it matters
It is useful for coordinating visual updates with the browser's painting cycle while keeping timing explicit.
Let’s make it click
An animation callback reads its timestamp, updates the intended visual state, and requests the next callback while the game runs.
Vibe Bro’s heads-up
A callback count is not a clock; movement based only on frames can vary across display refresh rates.
The docs behind it
Documentation links checked .
Editorial review · October 28, 2026
Supported: The one-shot rendering callback and timestamp model are accurately described; counting callbacks alone is not a refresh-independent clock.