Cooperative Scheduling with `requestIdleCallback`

Potch:

If you absolutely must perform tasks on the main thread (mutating the DOM or interacting with main-thread-only Web APIs), you can now request the browser provide you with a window of time in which it is safe to do so!

... requestIdleCallback allows the browser to wait until it identifies an idle period. An idle period may be a few milliseconds between painting individual frames.

This seems like the kind of thing that becomes a best practice. But how …

Cooperative Scheduling with `requestIdleCallback` is a post from CSS-Tricks