Trying out MooTools 1.2 Beta 1

Whilst I commonly use Prototype and as my preferred JavaScript libraries, I recently decided to try out MooTools as an alternative.

MooTools is a compact, modular, Object-Oriented JavaScript framework designed for the intermediate to advanced JavaScript developer. It allows you to write powerful, flexible, and cross-browser code with its elegant, well documented, and coherent API (

I downloaded MooTools version 1.2 beta 1, which is feature complete but not fully tested. If you are interested in what’s new in 1.2, see the MooTools blog: 1.2 beta 1.

My first impressions of MooTools were good and whilst I haven’t mastered the ‘Moo way of doing things,’ I got to grips with it quickly.

Comparison with Prototype

This is not an exhaustive comparison, it’s just my first impressions.

  • In MooTools effects are a Core component. With Prototype you need an additional effects library (e.g
  • When downloading MooTools you are able to select only the components you need and you are given the option of compressing the library.
  • I prefer Prototype’s documentation style. Initially I found MooTools hard to learn because the API documentation does not give sufficient examples of good practice etc…
  • I’m a fan of Dean Edward’s Base and MooTools has a really nice implementation of it.
  • MooTools acknowledges Prototype as an awesome library and a lot of code is based on Prototype.
  • Currently there is no central repository for MooTools extensions that I know of.

Prototype 1.6.0 weighs in at 121KB. Similarly, MooTools 1.2b1 (all components, uncompressed, no documentation) is 120KB. However, there is no need for an additional effects library and you can cut down the size of the MooTools library by removing unwanted components.

As I learn more of MooTools I will post more advice and tips on using MooTools from a Prototype background.