sitespeed.io/lib/core/script-source.js

sitespeed.io is an open-source tool for comprehensive web performance analysis, enabling you to test, monitor, and optimize your website’s speed using real browsers in various environments.

import { messageMaker } from '../support/messageMaker.js';

const make = messageMaker('script-reader').make;

export function findUrls(queue, options) {
  queue.postMessage(
    make('browsertime.navigationScripts', {}, { url: options.urls })
  );
}