This plugin integrates by default with Twitter bootstrap using badges to display the maximum lenght of the field where the user is inserting text. Uses the HTML5 attribute "maxlength" to work.

Project Page github.com Page

Bootstrap Maxlength

Default

default input with maxlength equal 20

Max Length 20

Input with threshold equal 20

All Available options

Input with threshold equal 20

Maxlength with textarea

Textarea with threshold equal 40