What is "use.typekit.net" doing in the header of a page?

Question

I am looking at this page.

I can see this in the header. Can someone explain what it does. I can't see any mention of it and what it is used for:

  <script class="js-allow-in-head" src="//use.typekit.net/txx2jfv.js"></script>
  <script class="js-allow-in-head">try{Typekit.load();}catch(e){}</script>

thanks

Answer 1

Typekit is a provider of webfonts. They probably are the only service that benefits from having the script in the head, because it blocks rendering while the fonts download, thus preventing a FOUT (flash of unstyled text)

The script works by fetching some css files that contain the fonts in base64 encoding.

Answer 2

//use.typekit.net/txx2jfv.js is the script including in the header of page..this file contain some jquery code...The use of that code is to use beautiful FONTS on your page...check the site https://typekit.com/