Javascript OOP function printing as string

Question

Trying to get my head around javascript OOP, why is this causing the test method to print the entire function definition as if it was a string?

var Myclass = function Myclass(){
    this.connection = make_ajax();
    this.hasConnection = function(){return this.connection};

    this.test = function(){
        console.log(this.hasConnection); 
    }
}
var x = new Myclass();
x.test();

Result:

log: function(){return this.connection}

var Myclass = function Myclass() should either by var Myclass = function() or function Myclass() — Rob M.
– Rob M., Commented Feb 20, 2014 at 14:08

Niet the Dark Absol · Accepted Answer · 2014-02-20 14:07:34Z

3

Because... you're not calling the function. You're logging the function itself, and since logging requires a string it calls the built-in toString method which returns the function as a string.

Try console.log(this.hasConnection());

answered Feb 20, 2014 at 14:07

Niet the Dark Absol

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3 Comments

Kiee Over a year ago

Thanks for the insight, say I wanted hasConnection to remain a property with out having to call it, is there another way to store the result of the function inside the variable?

Niet the Dark Absol Over a year ago

Isn't that just this.connection?

Kiee Over a year ago

I suppose it could be yeah I just wanted an official bool, I like to make things more complicated for my self :P, i shall now remove the pointless addition but thanks for clearing up the function call thing :)

Tyson Gern · Accepted Answer · 2014-02-20 14:11:59Z

0

When you

consloe.log(this.hasConnection);

you are logging the actual function, not the result of calling the function. Try changing this line to

consloe.log(this.hasConnection());

answered Feb 20, 2014 at 14:11

Tyson Gern

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