打开控制台console输入这行代码 🤣 
document.addEventListener('DOMContentLoaded', function() {
    const script = document.createElement('script');
    script.src = 'https://registry.npmmirror.com/page-agent/1.5.6/files/dist/iife/page-agent.demo.js';
    script.crossOrigin = 'true';
    document.head.appendChild(script);
});