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