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Brocket - A self-hosting and self-extensible (meta)class system for Javascript


npm install Brocket

or for a global install

npm install -g Brocket

What is it?

Brocket aims to make OO programming in JavaScript (or Coffeescript) easier and more fun. It allows you to declare classes using a simple declarative DSL-ish syntax.

Under the hood, Brocket is based on a powerful meta-model. Every aspect of Brocket is itself a class, providing powerful introspectiona nd extension features.

Brocket is a port of Perl's Moose.

Alpha Warning

This is an early version of Brocket. A lot of it isn't done. In particular, it is not yet self-bootstrapping, so you cannot extend Brocket by using Brocket-based classes (this will be coming in the future), and it does not provide any code generation features to make things faster.

In other words, it's incomplete and slow.


Creating a class with Brocket:

Brocket = require("Brocket");
Person = Brocket.makeClass( "Person", function (B) {
    B.has( "firstName", { access: "ro" } );
    B.has( "lastName",  { access: "ro" } );
    B.has( "age",       { access: "ro", default: 0 } );
    B.method( "greet", function () {
        console.log "Hi, my name is " + this.firstName() + ".";
    } );
} );
User = Brocket.makeClass( "User", function (B) {
    B.has( "username",  { access: "rw" } );
    B.has( "password",  { access: "rw" } );
    B.has( "lastLogin", { access: "rw" } );
    B.method( "login", function (password) {
        if ( password != this.password() ) {
            return false;
        this.lastLogin( new Date );
        return true;
    } );
} );
bob = new User ( {
    firstName: "Bob",
    lastName:  "Smith",
    username:  "bob.smith",
    password:  "password"
} );
if ( bob.login(password) ) {

Here's a class example in CoffeeScript

Brocket = require "Brocket"
Person = Brocket.makeClass "Person"(B) ->
    B.has "firstName"access: "ro"
    B.has "lastName",  access: "ro"
    B.has "age",       access: "ro"default: 0
    B.method "greet"->
        console.log "Hi, my name is #{ @firstName() }."