Early Binding & Late Binding in JavaScript

LateBinding.js

// Early Binding vs Late Binding

// Early Binding
var sum = function(a, b) {
  return a + b;
};

var x = 5, y = 6;
var sum5n6 = sum.bind(null, x, y);

x = 10;
y = 5;
console.log("with Early Binding -->", sum5n6());

// Late Binding
var sum2 = function(p) {
  return p.x + p.y;
};

var x = 5, y = 6;
var n = {x: x, y: y};
var sumLate = sum2.bind(null, n);

n.x = 10;
n.y = 5;

console.log("Late Binding -->", sumLate());

Thanks for this simple and clear example.
Maybe you could add the result:

with Early Binding --> 11
Late Binding --> 15

Why with js, defining a function triggers the message "undefined"?...

I read that bind is deprecated in favor of or (??). Or maybe it's related to jQuery? (which is a js library)
https://www.w3schools.com/jquery/event_bind.asp
What is the truth?