You'll have to define "OOP" first. Everyone thinks its defined, but even among OOP proponents there isn't consensus ("it's about message passing", "it's about encapsulation", "it's about inheritance", "it's about dot-method syntax", etc).
In OOP data and method are unionized into primitives that form the basic building blocks of your program.
This is unique to OOP. It must be the definition. Defining it in terms of message passing, encapsulation and inheritance are not as good because these concepts are used in other paradigms as well.
const p = Point(3, 5)
p('getX') // 3
p('up', 11)('toString') // "Point(3, 16)"
const Point = (x, y) => (method, ...args) => {
switch (method) {
case 'getX': return x;
case 'getY': return y;
case 'toString': return `Point(${x}, ${y})`
case 'up': return Point(x, y+args[0]);
// ...
}
}
At best what I've done here is eliminate some of the vagueness surrounding the definition, which is really all that's needed in most cases.