Lack of interest Add a warning prompt if navigating away from new/edit post page

[Optic]

To help prevent information from being lost when creating/editing a long post, I would like to see a warning prompt appear if a user accidentally navigates away from the page (e.g. pressing backspace when text box is not in focus OR if they click any other link on your header/footer).

The warning prompt would of course not appear if you click the Create Thread/Preview/Submit buttons.

I understand some communities may find this annoying, so it could be an option that could be toggled in the Admin CP.

I found a jQuery plugin that could achieve this, would be nice if it was a core feature:
codedance/jquery.AreYouSure · GitHub

Chrome:

Firefox:


Demo of the above script:
Demo: Are You Sure? - a dirty forms jQuery Plugin

 

[Amaury]

The draft feature already accomplishes this, doesn't it?

 

[Optic]

Yes the current Drafts feature works quite well when you're writing a new post/thread, but according to @Mike, drafts aren't saved when you're editing a post.

I believe the warning prompt is "extra insurance" and could complement the existing drafts implementation.