extensive

Tiny javascript library for extending objects Backbone-style.

Installation

npm install extensive

Usage

const extend = require('extensive');
 
const Animal = extend(function(name) {
    this.name = name;
}, {
    speak: function() {
        console.log("...");
    }
}, {
    isAnimal: function(obj) {
        return obj instanceOf Animal;
    }
});
 
var test = new Animal("test");
 
test.speak();
// "...""
 

A constructor created with extensive will provide a static extend method to create subclasses.

const Cat = Animal.extend(function(name, owner) {
    this.name = name;
    this.owner = owner;
}, {
    speak: function() {
        console.log("meowww");
    },
 
    showAffection: function(person) {
        if (person === this.owner) {
            console.log("purr");
        } else {
            console.log("hissss");
        }
    }
});
 
var felix = new Cat("felix", "brebory");
 
felix.speak();
// "meowww"
 
felix.showAffection("gina");
// "hissss"
 
felix.showAffection("brebory");
// "purr"
 
Cat.isAnimal(felix);
// true