Factory Method Pattern in JavaScript

• Posted: November 10, 2008
• |
• Author: Vorleak Chy
• |
• Filed under: Design Patterns
• |
• Tags: Design Patterns, JavaScript

Last two months I posted about Factory Method Design Pattern in C#. Now I do the same thing in JavaScript.

This is a simple example of the factory method pattern in JavaScript, The factory method getPhone() will generate Phone object. I just keep as organizing with namespace “Patterns” as in C#.

var Patterns = {};

Patterns.Nokia = function(){
    this.getPrice = function(){
        return 200;
    };
};

Patterns.Motorola = function(){
    this.getPrice = function(){
        return 100;
    };
};

Patterns.PhoneFactory = {
    getPhone : function(type){
        switch(type){
            case "Motorola":
                return new Patterns.Motorola();
            case "Nokia":
            default:
                return new Patterns.Nokia();
        }
    }
};

var phone = Patterns.PhoneFactory.getPhone("Nokia");
console.log(phone.getPrice());

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