CSS delivery optimization: How to defer css loading?

Question

I am trying to optimize the CSS delivery following the google documentation for developers https://developers.google.com/speed/docs/insights/OptimizeCSSDeli

Answer 1

In addition to Fred's answer:

Solution using jQuery & Noscript

  
    
    
    
    
  
    

      Hello, world!
    
  

from http://www.vidalquevedo.com/how-to-load-css-stylesheets-dynamically-with-jquery

Using pure Javascript & Noscript

  
    
    
    
  
    

      Hello, world!