Can't parse a website

How to?
#1

Google chrome's console says:

A parser-blocking, cross site (i.e. different eTLD+1) script, https://ssl.google-analytics.com/ga.js, is invoked via document.write. The network request for this script MAY be blocked by the browser in this or a future page load due to poor network connectivity. If blocked in this page load, it will be confirmed in a subsequent console message. See https://www.chromestatus.com/feature/5718547946799104 for more details.

#2

According to Google Developers article, you can:

  • Use asynchronous script loading, using <script src="..." async> or element.appendChild() ,

It is better don't use document.write for CDN, here is workaround:

var script = document.createElement('script');  
script.src = "....";  
document.head.appendChild(script);