How to detect a textbox's content has changed

Question

I want to detect whenever a textbox's content has changed. I can use the keyup method, but that will also detect keystrokes which do not generate letters, like the arrow keys. I thought of two methods of doing this using the keyup event:

1. Check explictly if the ascii code of the pressed key is a letter\backspace\delete
2. Use closures to remember what was the text in the textbox before the key stroke and check whether this has changed.

Both look kinda cumbersome.

Answer 1

Start observing 'input' event instead of 'change'.

jQuery('#some_text_box').on('input', function() {     // do your stuff }); 

...which is nice and clean, but may be extended further to:

jQuery('#some_text_box').on('input propertychange paste', function() {     // do your stuff });