一行神奇的好玩的代码

打开任意网站控制台console输入这行代码 

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);

https://github.com/alibaba/page-agent