addEventListener() as a global function

Question

I just caught up in a confusion.
if suppose I implement addEventListener() as a global function (unlike as a method of some specific node like node.addEventListener() ) then does it act just like a usual global function or something goes under the hood while executing the code ending up becoming a method of some specific node

Note: DOM level 2, which defined the addEVentListener, stipulates that handler gets registered to the node. so which node is it registered to; window object is not a node

Answer 1

It will applies to the global object window (which have the function addEventListener). Because:

var a = 5;

console.log(a);
console.log(window.a);

Thus:

addEventListener( ... );

is the exact same things if you use:

window.addEventListener( ... );