codef0rmer/learn.jquery.com — comment on commit 95c341566b57f52cc1952943b6060101614bbdb3
File: content/jquery-basics/document-ready.md line 62
By codef0rmer:

I tried to use that url but I'd got this "Refused to display document because display forbidden by X-Frame-Options." error and iframe did not load the page at all. Unfortunately I could not resolve the issue so decided to use techcrunch.com.