Confused!

[Amit20]

Hello Friends....

 

I was going through js tutorials online and now i have got this doubt;

 

z = new Boolean(false);
if(z)        //Condition returns true 

 

i just want to know why the value of z  evaluates to true and

and when i alert the value of z it comes out to false.

 

Plz Explain!!!

[Adam]

You're testing against the Boolean object itself, not the boolean value. The object contains a toString() method that returns the boolean value when you use it in a string context.

[Amit20]

Thanks for reply.

 

But while checking the value of z in if condition it evaluates to true. y???

[Adam]

You're comparing an object, which will return true as it exists (and isn't null or undefined). Think of it more like this:

 

if (object) {
    // object exists
}

 

Whereas a normal boolean comparison is:

 

if (boolean) {
    // boolean is true
}

[Amit20]

Oh Got It!!!

 

Thanks alot