forked from cybrespace/pinafore
30 lines
835 B
JavaScript
30 lines
835 B
JavaScript
// Wrapper to call requestIdleCallback() to schedule low-priority work.
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// See https://developer.mozilla.org/en-US/docs/Web/API/Background_Tasks_API
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// for a good breakdown of the concepts behind this.
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import Queue from 'tiny-queue'
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import { mark, stop } from './marks'
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const taskQueue = new Queue()
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let runningRequestIdleCallback = false
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function runTasks (deadline) {
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mark('scheduleIdleTask:runTasks()')
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while (taskQueue.length && deadline.timeRemaining() > 0) {
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taskQueue.shift()()
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}
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if (taskQueue.length) {
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requestIdleCallback(runTasks)
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} else {
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runningRequestIdleCallback = false
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}
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stop('scheduleIdleTask:runTasks()')
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}
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export function scheduleIdleTask (task) {
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taskQueue.push(task)
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if (!runningRequestIdleCallback) {
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runningRequestIdleCallback = true
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requestIdleCallback(runTasks)
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}
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}
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