pinafore/routes/_utils/runMediumPriorityTask.js

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import { scheduleIdleTask } from './scheduleIdleTask'
import { store } from '../_store/store'
import { isMobile } from './isMobile'
// Run a task that doesn't need to be processed immediately, but should
// probably be delayed if we're on a mobile device. Also run it sooner
// if we're in a hidden tab, since browsers throttle or don't run setTimeout/rAF/etc.
export function runMediumPriorityTask (fn) {
if (store.get().pageVisibilityHidden) {
fn()
} else if (isMobile()) {
scheduleIdleTask(fn)
} else {
requestAnimationFrame(fn)
}
}