Base

A simple yet reasonable and useful inheritance system for JavaScript.

The implementation is just a few dozen lines of code and it is well commented. Refer to the code for documentation.

Here is some example code illustrating the use of this system in Node:

var Base = require('path/to/base');

// Use `extend` for inheritance.
var Person = Base.extend('Person');
console.log(Person.name)       // => Person

// Inherit from other base objects.
var Canadian = Person.extend('Canadian');

// There are `init` methods.
Canadian.prototype.init = function(fields) {
  fields = fields || {};
  fields.nationality = 'Canadian';

  // Calls `Person.init` on `this`
  // (short for Person.prototype.init.call(this, fields))
  this.callSuper('init', fields);
};

// Instantiate objects with `create`
var p = Canadian.create({ name: 'samsonjs' });

// `init` calls `this.mixin(fields)` by default
// (mixin does exactly what you think it does)
console.log(p.name);           // => samsonjs
console.log(p.nationality);    // => Canadian

// You can check if an object inhertits from any base object.
console.log(p.like(Canadian)); // => true
console.log(p.like(Person));   // => true
console.log(p.like(Base));     // => true
console.log(p.like(Object));   // => true

var American = Person.extend('American');
console.log(p.like(American)); // => false

License

MIT License

1.5 KiB Raw Blame History

Base

License

1.5 KiB

Raw Blame History