[Javascript] Use requestIdleCallback to schedule JavaScript tasks at an optimal time
2024-08-29 00:04:40
JavaScript is single-threaded, which can present some problems when creating an interactive user experience. If JavaScript runs too long while a user is attempting to interact with a page, it can cause noticeable jank or lag, which degrades the experience. requestIdleCallback
is a DOM API that allows you to schedule a JavaScript function to be run when the page thread is idle, so your JavaScript doesn't get in the way of the user.
let id = requestIdleCallback(
() => {
console.log("idle callback called");
},
{ timeout: } // the function must be run within 2 seconds
); cancelIdleCallback(id);
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