Bodyguard

Because sometimes you want something like interfaces in JavaScript

Installation

If you are using Node.js: npm install bodyguard
If you are using Bower: bower install bodyguard (If you also want to save the configuration in your package.json or bower.json add --save to the command.)

Don't use npm or bower? Just grab bodyguard.js from the dist folder and embed it in your application.

Example

JavaScript:

var MyClass = (function() {
  var MyClass = function() {};
  
  MyClass.prototype.a = function() {
    return 5;
  };
  
  MyClass.prototype.b = function() {
    return 6;
  };
  
  MyClass.prototype.c = function() {
    return 7;
  };
})();
 
var NewClass = bodyguard('NewClass', ['a', 'b'], new MyClass());
// NewClass can now be instantiated and returns an object with a and b bound
// to its prototype

CoffeeScript:

class MyClass
  constructor: ->
  
  a: -> 5
  b: -> 6
  c: -> 7
  
NewClass = bodyguard 'NewClass', ['a', 'b'], new MyClass()
# NewClass can now be instantiated and returns an object with a and b bound 
# to its prototype 

(Yes, we all know, technically we shouldn't be calling it classes in JavaScript. :) )