@mtdt.temp/browser-core/esm/tools/requestIdleCallback.js

Datadog browser core utilities.

import { setTimeout, clearTimeout } from './timer';
import { monitor } from './monitor';
import { dateNow } from './utils/timeUtils';
/**
 * 'requestIdleCallback' with a shim.
 */
export function requestIdleCallback(callback, opts) {
    // Note: check both 'requestIdleCallback' and 'cancelIdleCallback' existence because some polyfills only implement 'requestIdleCallback'.
    if (window.requestIdleCallback && window.cancelIdleCallback) {
        const id = window.requestIdleCallback(monitor(callback), opts);
        return () => window.cancelIdleCallback(id);
    }
    return requestIdleCallbackShim(callback);
}
export const MAX_TASK_TIME = 50;
/*
 * Shim from https://developer.chrome.com/blog/using-requestidlecallback#checking_for_requestidlecallback
 * Note: there is no simple way to support the "timeout" option, so we ignore it.
 */
export function requestIdleCallbackShim(callback) {
    const start = dateNow();
    const timeoutId = setTimeout(() => {
        callback({
            didTimeout: false,
            timeRemaining: () => Math.max(0, MAX_TASK_TIME - (dateNow() - start)),
        });
    }, 0);
    return () => clearTimeout(timeoutId);
}
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