nicjansma

//
// Naive ResourceTiming crawl of all IFRAMEs.
//
// Based on https://github.com/SOASTA/boomerang/blob/master/plugins/restiming.js
// which you should use to deal with all of the caveats (e.g. startTime adjusting)
//

function isFrameAccessible(frame) {
    var dummy;

nicjansma

//
// Placed in any cross-origin IFRAMEs
//
if (window !== window.top) {
    if (typeof window.PerformanceObserver !== "function") {
        return;
    }

    // Listen for all ResourceTimings, repeating them to the parent window
    var observer = new PerformanceObserver(function(entries) {

nicjansma

/**
 * Repeats all beacons to a second URL.
 *
 * To configure, update BEACON_URL.
 *
 * This code repeats some code from Boomerang.  If you only need to send
 * XHR beacons, or only image beacons, or not sendBeacon(), it could be trimmed down.
 *
 * @class BOOMR.plugins.BeaconRepeater
 */

nicjansma

    //
    // Helper Functions
    //

    // Gets a parameter from the URL
    static function extractGetParameter(name, query) {
        return decodeURIComponent((new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(query) || [,""])[1].replace(/\+/g, '%20')) || null;
    }

    // Gets a POST or GET parameter

nicjansma

/**
 * The `WaitAfterOnload` Boomerang plugin waits for the specified number of seconds after
 * onload before a beacon is sent.
 *
 * It does not affect the Page Load time (`t_done`) -- it just delays a beacon
 * for the specified number of seconds.  This allows the beacon to contain additional
 * ResourceTiming data and other metrics/timers that might happen after page load.
 *
 * NOTE: Any plugin like this that delays a beacon from being sent after onload
 * will have an effect on total number of beacons captured (due to the visitor

nicjansma

/**
 * The Boomerang CWV plugin assists in sending Core Web Vitals metrics First Input Delay (FID) and
 * Cumulative Layout Shift (CLS) at the end of the page session.  It does this by sending
 * an additional "Page Exit" beacon prior to unload.
 *
 * The main changes in behavior over the EventTiming plugin (which sends FID) and Continuity
 * plugin (which sends CLS) are:
 *
 * * If FID was _not_ on the Page Load beacon, this plugin sends FID on the Page Exit beacon.
 *   If FID was on the Page Load beacon, it is _not_ repeated on the Page Exit beacon.

nicjansma

/**
 * The Boomerang DisableUnloadBeacon plugin disables sending of the Unload beacon.
 *
 * The Unload beacon can be used to understand Session Duration (seconds on the page), but may not be needed in all cases.
 */
 (function() {
    window.BOOMR = window.BOOMR || {};
    window.BOOMR.plugins = window.BOOMR.plugins || {};

    window.BOOMR.plugins.DisableUnloadBeacon = {