CODEWITHSUNDEEP
javascript
Exegesis
Exegesis

Reputation: 1078

Javascript Object-Oriented-Programming

I found a Module pattern in JS:

<script>
var MODULENAME = (function(my, $) {
    my.publicVar = "5";
    my.publicFn = function() {};
    return my;
}(MODULENAME || {}, jQuery));
</script>

However I cannot perform instantiation. Does the module pattern allow for that?

Upvotes: -1

Views: 90

Answers (3)

bfavaretto
bfavaretto

Reputation: 71918

Your module object can contain anything. Perhaps you're looking for including a constructor in it:

var MODULENAME = (function(my, $) {

    var privateVar = 10;
    my.SomeConstructor = function() {
        this.publicVar = 5;
    }
    my.SomeConstructor.prototype.someMethod = function() {};
    my.SomeConstructor.prototype.getPrivate = function() { return 10; };

    return my;
}(MODULENAME || {}, jQuery));

var instance = new MODULENAME.SomeConstructor();
instance.publicVar;    // 5
instance.privateVar;   // undefined
instance.getPrivate(); // 10

Upvotes: 1

kamituel
kamituel

Reputation: 35960

Instantiantion means basically that you'll run a function using new.

So maybe you're looking for this?

var Some = function (param) {
  var somePrivateVar = 'private';
  this.somePublicVar = 'public';

  this.method = function () {
    return param;
  };
};

var some = new Some('abla');
console.log(some.method());
// some.somePrivateVar === undefined
// some.somePublicVar === 'public'

In your case MODULENAME is an object (object, not a function) with publicVar and publicFn. It's not meant to be instantiated the same way you wouldn't call new jQuery().

Upvotes: 3

Misters
Misters

Reputation: 1347

You can do this also with prototype Inheritance :

var MyClass = function(name)
{
//sharing name within the whole class
this.name = name;
}

MyClass.prototype.getName = function(){
return this.name;//now name is visible to getName method too
}

MyClass.StaticMethod = function()
{
console.log("Im Static");

// and since is not in prototype chain, this.name is not visible
}

    var myclass = new MyClass("Carlos");
    console.log(myclass.getName())//print "Carlos"
MyClass.StaticMethod()// print "Im Static"
myclass.StaticMethod() // error

Se all this article

Upvotes: 1

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