CoffeeScript TypeScript

The usage of CoffeeScript and TypeScript are the same as Less and Sass. 

Once you have the engines installed, the related file extension will be avaiable when you are creating a script file. 

Or you can then use the engine in the HTML tag attribute. 

<script engine='coffeescript'>

number   = 42
opposite = true

number = -42 if opposite


Please see the charpter of Less, Sass, Scss for more information.