jsPatterns.publicStatic.js

jsPatterns.publicStatic.js

// constructor
var Gadget = function (price) {
    this.price = price;
};
// a static method 
Gadget.isShiny = function () {
    // this always works
    
    var msg = "you bet";
    if (this instanceof Gadget) {
        // this only works if called non-statically
        msg += ", it costs $" + this.price + '!';
    }
    return msg;
};
// a normal method added to the prototype 
Gadget.prototype.isShiny = function () {
    return Gadget.isShiny.call(this);
};

//output test
Gadget.isShiny(); // "you bet"
var a = new Gadget('499.99');
a.isShiny(); // "you bet, it costs $499.99!"