JavaScript Module Pattern

Smanjivanje broja globalnih promenljivih i njihovo premeštanje u lokalne (privatne) promenljive donosi više reda u svim jezicima, pa tako i u JavaScript kodu. Ako znamo da se na stranicama često nalazi više različitih skripti ovakvo označavanje ima više smisla.

Module Pattern

//Single Global Variable "Module"
var Module = ( function ( ) {
    var privateVariable = "some value";
    var privateMethod = function ( ) {
        //do something.
    }
    //returning one anonymous object that will expose public methods.
    return {
        publicMethod : function ( ) {
            //this method can access its private variable and method
            //by using the principle of closure.
            alert(privateVariable);
            privateMethod( );
        }
    }
})( );

Primer za Module Pattern

//One Global object exposed.
var SearchEngine = (function ( ) {
    //Private Method.
    var luckyAlgo = function ( ){
        //create one random number.
        return Math.floor(Math.random()*11);
    }
    //Returning the object
    return {
        //Public method.
        getYourLuckyNumber : function ( ){
            //Has access to its private method because of closure.
            return luckyAlgo();
        }
    }
} ) ( );//Self executing method.

Detaljnije pročitajte ovde