https://github.com/GoogleChrome/puppeteer/blob/v1.11.0/docs/api.md#
Puppeteer is a Node library which provides a high-level API to control Chromium or Chrome over the DevTools Protocol.
- screenshot
- generate pdf
- SSR
-判断servicework启用情况
-获取文件加载的timeline的json文件,可以上传到devtool中查看具体资源情况
-code 加载时间 (coverage.js)
-爬虫 (这个不太好防,毕竟是模拟浏览器行为)