requestIdleCallback()The requestIdleCallback() API queues a function that runs in idle browser time, either at the end of a frame or when the user is inactive. Also known as the background tasks API.limitedhttps://w3c.github.io/requestidlecallback/requestidlecallbackhttps://developer.mozilla.org/docs/Web/API/IdleDeadlineapi.IdleDeadlineapi.IdleDeadline.didTimeoutapi.IdleDeadline.timeRemainingapi.Window.cancelIdleCallbackapi.Window.requestIdleCallbackhttps://nowyoucanuse.com/features--requestidlecallback.html