// Number -> Proxy Life Cycle

NumbersProxyChain.js

// Number -> Proxy Life Cycle

const ogp = Object.getPrototypeOf;

var a = new Number(5);
a.extract = function () {
	return a.valueOf();
};

console.log(a.extract());

var b = new Proxy(a, {});

console.log(b.extract());

var c = new Number(7);
c.extract = function () {
	return c.valueOf();
};

Object.setPrototypeOf(Object.getPrototypeOf(c), b);

console.log('c.valueOf()', c.valueOf());
console.log('c.extract()', c.extract());
console.log('ogp(c).extract()', ogp(c).extract());