Can an Object be false?

Question

Is there any way to make an object return false in javascript?

var obj = new Object();

console.log(!!obj) // prints \"true\" even if it\'s empty
         


        

Answer 1

No. But null will convert to false.

> typeof(null)
"object"
> null instanceof Object
false
> !!null
false

To see if the object contains any properties, use (shamelessly copied from How do I count a JavaScript object's attributes?):

function isEmpty (obj) {
    for (var k in obj) 
       if (obj.hasOwnProperty(k))
           return false;
    return true;
}