semaphore/src/routes/_utils/runMediumPriorityTask.js

20 lines
669 B
JavaScript

import { scheduleIdleTask } from './scheduleIdleTask'
import { store } from '../_store/store'
import { isMobile } from './userAgent'
// Rough guess at whether this is a "mobile" device or not, for the purposes
// of "device class" estimations
// 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)
}
}