I've been trying out a few JavaScript and jQuery code samples for automatically resizing/expanding the height of a text area as more text gets typed.

It's been quite difficult to find code that worked for my needs and I had forgotten to write down references of some code which I did find which was functional but just did not work for my needs.

As I'm still looking around to improve the one I am currently using here, I thought I'd write and update this post as I come across others.

So here goes:

JavaScript textarea sizer by Paul Tuckey (2008). Demo & Download ->Usage: by including the JavaScript code in the page, all text areas will automatically resize/expand. Specific text areas can also be excluded. There does not seem to be any online documentation or user feedback.
jQuery auto expanding text area by Craig Buckler (2009). Demo | Download ->Usage: by including the jQuery code in the page, all text areas with a specifc class name will automatically resize/expand. There is a 3 page tutorial (p1, p2, p3) on how to build the jQuery plugin. You can download the source code from page 3 but the 3 page tutorial may be useful if you wish to customise the code for your needs. There is also some user feedback about customising the code.
jQuery Autosize by Jack More (2011) Demo & Download ->Usage: by including the jQuery code in the page and adding another short jQuery code to page, all text areas will automatically resize/expand. There are many comments, questions and feedback from users and Jack himself which should provide a good understanding of how to customise the code.
Expanding Textareas jQuery Plugin by Brian Grinstead (2012)
Demo | Download
->Usage: by including the jQuery code in the page and adding a specific class to the text area, all text areas will automatically resize/expand.
There are user comments and feedback from users and Brian himself which should provide a good understanding of how to customise the code.

Other auto expanding text areas.

If you come across any other JavaScript or jQuery code to resize/expand text areas then please let me know and I can add them above.