Adding methods to a JavaScript object

Question

I have an object that's the argument of a function.

I want to add methods to those objects, so I can easily perform operations on them.

How do I add those methods to the object?

stuff.on('move', function (element) {
    element.remove()
    element.add()
    element.change()
})

Answer 1

element.remove = function(){
    ...
};