js-library-detector

import { JSDOM } from 'jsdom'; import { detect } from 'js-library-detector'; async function detectLibrariesOnPage(url) { try { const response = await fetch(url); const html = await response.text(); const dom = new JSDOM(html, { url: url, resources: 'usable', runScripts: 'dangerously', beforeParse(window) { // Mock common browser APIs if necessary for detections that rely on them window.Element.prototype.getBoundingClientRect = () => ({ width: 10, height: 10, top: 0, left: 0, bottom: 0, right: 0, }); } }); // Wait for the DOM and scripts to load/execute // This is crucial as many libraries are initialized after page load await new Promise(resolve => { dom.window.addEventListener('load', resolve); // Fallback in case 'load' doesn't fire for some reason (e.g., no scripts) setTimeout(resolve, 5000); // Wait up to 5 seconds for scripts }); // Perform detection using the JSDOM window object // The detect function expects a window object as 'this' context const detected = detect.call(dom.window, { html: dom.window.document.documentElement.outerHTML }); const detectedNames = Object.keys(detected).filter(lib => detected[lib].found); console.log(`Detected libraries on ${url}:`); if (detectedNames.length > 0) { detectedNames.forEach(name => { console.log(`- ${name} (version: ${detected[name].version || 'N/A'})`); }); } else { console.log('No known libraries detected.'); } } catch (error) { console.error(`Error detecting libraries on ${url}:`, error); } } // Example usage: detect libraries on a public website (e.g., Google) // Note: This requires 'jsdom' and 'node-fetch' to be installed. // `npm install jsdom node-fetch` detectLibrariesOnPage('https://www.google.com/');