idle-callback

Strongly-typed requestIdleCallback polyfill

``typescript
import { requestIdleCallback, cancelIdleCallback } from 'idle-callback';

const id = requestIdleCallback(
(deadline: IdleDeadline) => {
while (deadline.timeRemaining() > 0) {
// perform some work
}
},
{ timeout: 1000 },
);

cancelIdleCallback(id);
``