Javascript logic syntax

Question

My task was to create an object/class called MrFreeze and mark this object as frozen so that no other changes can be made to it.] I came up with the following solution which worked:

Object.freeze(MrFreeze);

But then as I viewed the solutions provided on http://www.codewars.com I came across this code:

(Object.freeze || object)(MrFreeze);

I fail to understand this line of code. Please explain why this works when using a OR object operator.

Answer 1

Seems like a fallback to me.

when Object.freeze does exist it performs:

Object.freeze(MrFreeze);

when Object.freeze doesn't exist it performs:

object(MrFreeze);

This might as well be written as (more verbose for clearification):

function freeze(MrFreeze, object) {
    if (Object.freeze) {
        Object.freeze(MrFreeze);
    }
    else {
        object(MrFreeze);
    }
}