Implementing a resizable textarea?

Question

How does Stackoverflow implement the resizable textarea?

Is that something they rolled themselves or is it a publicly available component that I can easily attach to textareas on my sites?

I found this question and it doesn't quite do what I want.

autosizing-textarea

That talks more about automatically resizing textareas whereas I want the little grab-area that you can drag up and down.

Answer 1

I needed a similar functionality recently. Its called Autogrow and it is a Plugin of the amazing jQuery library

Answer 2

StackOverflow uses a jQuery plugin to accomplish this: TextAreaResizer.

It's easy enough to verify this - just pull the JS files from the site.

BTW: there was some discussion of this feature on UserVoice prior to its implementation on the site.