mayakraft/index.html

## index.html
<!DOCTYPE html>
<title>.</title>
<script>

// must instantiate with "new"
var Point = function (x, y) {
  this.x = x;
  this.y = y;
};

// "new" not needed
var Vector = function (x, y) {
  var proto = {};
  // this is so the "enumerable" property defaults to false
  Object.defineProperty(proto, "constructor", { value: Vector });
  var v = Object.create(proto);
  v.x = x;
  v.y = y;
  return v;
};

// test instanceof
var p = new Point(1, 2);
var v = Vector(1, 2);
console.log(
  p instanceof Point,
  v instanceof Vector
);

</script>
	<!DOCTYPE html>
	<title>.</title>
	<script>

	// must instantiate with "new"
	var Point = function (x, y) {
	this.x = x;
	this.y = y;
	};

	// "new" not needed
	var Vector = function (x, y) {
	var proto = {};
	// this is so the "enumerable" property defaults to false
	Object.defineProperty(proto, "constructor", { value: Vector });
	var v = Object.create(proto);
	v.x = x;
	v.y = y;
	return v;
	};

	// test instanceof
	var p = new Point(1, 2);
	var v = Vector(1, 2);
	console.log(
	p instanceof Point,
	v instanceof Vector
	);

	</script>