Obtain current page's source using javascript and DOM [duplicate]

Question

How do I obtain the current page's source using JavaScript and DOM? Would I have to use AJAX?

Answer 1

The current page's source:

document.documentElement.outerHTML

Obviously, that is what the page looks like right now. In case of DHTML, if you want to get the unmodified source as it was served from the server, you will need to make an AJAX call to receive it again, and capture it there.

EDIT: was incorrectly innerHTML.