Question

There’s a lot of hubub about “cloning” JavaScript objects. However, as I understand it, it’s a simple matter:

function clone(obj) {
    return obj;
}

Now I realize that DOM objects aren’t cloned this way, but as I understand it the DOM is part of the browser, not part of JavaScript.

What objects require deep-cloning and why?

Answer 1

That just returns a reference to the exact same object. It doesn’t clone anything.

x = {}, 
c=function(o){return o}, 
y = c(x), 
result = (x === y)

result is true