Class

Yet another wrapper for creating classes in js.

Installation

npm install osh-class

Example usage

var Class = require('osh-class');

var Boat = Class(function(opts) {
  // Do stuff with opts object here.
});

// Add methods to prototype like usual.
Boat.prototype.start = function() {
  if (!this.opts.fuel) {
    throw new Error('Put fuel in it.');
  }
};

// You don't have to use new Boat(), but can if you want
var boat = Boat();

// Subclass Boat
var Canoe = Class(Boat, function(opts) {
  opts = {fuel: true};
  this._super(opts);
});

Documentation

Signature:

Class([Function super,] Function constructor)

The Class function takes 1 or 2 arguments. One of them is always a constructor function for your class. If 2 arguments are given, the former is the super class and should be the result of a previous call to Class.

The constructor function should always accept a single argument: an options object. This object will be stored automatically on a class instance as this.opts.

A Class constructor is equipped with a this._super(opts) method,

var A = Class(function(opts) { //... });
var B = Class(A, function(opts) {this._super(opts);});

is equivalent to

var A = Class(function(opts) { //... });
var B = Class(A, function(opts) {A.call(this, opts);});

Idempotency

Example:

var A = Class(function(opts) {
  this.name = opts.name;
});

var a = A({name: 'Oscar'});
var a2 = A(a);

console.log(a === a2); // true

License

MIT