How does cross domain ajax work?

Question

JavaScript

The task is to take the content of a tag with a certain class on someone else's page and copy its html content into your container (on your page) using ajax.
There is an article on this topic james.padolsey.com/javascript/cross-domain-request...

Please help me understand with an example - create a simple script in the sandbox that copies the contents of the wp_syntax class from the same page james.padolsey.com/javascript/cross -domain-request... and output it to some div block.
Thanks a lot.

--If not ajax, then how to solve this problem using other methods?

Answer 1

output.jsbin.com/fifabovafe
Like this - everything works

Answer 2

What if you use file_get_contents or curl on your server? That is, you send an ajax request to your server, your server requests another server and returns the results to you.