Javascript: Unicode symbol picker (for adding math symbols to a textarea)

Question

I'm looking for a solution to allow users to add unicode characters (math symbols for now) to a textarea by clicking a button. I was hoping there was some kind of symbol picker class/plugin out there that would do this so I didn't have to recreate the wheel here.

I found this one but it's basically a proof of concept. Does anyone know of anything that's a bit more finished? A jQuery plugin would be great but I haven't found any yet.

EDIT

I also found this one. It seems to be based on the same source though and also attempts to render unsupported characters.

Answer 1

I've made 2 extensions, with the functionality you are looking for.

Chrome: https://chrome.google.com/webstore/detail/utf-8-and-unicode-charact/fcemphgmjnjpmmdhcedhjiegickfbiia

Firefox: https://addons.mozilla.org/firefox/addon/utf8-characters/

Here you can find only the math symbols in html:

https://github.com/codexico/UTF-8-Chrome-Extension/blob/master/html/groups/math.html

And the chars with description:

https://github.com/codexico/UTF-8-Chrome-Extension/blob/0361f41452f3c2165324dac437ff7ffa60b267f2/popup.html