A JavaScript function that reproduce itself as a Quine program

quine.js

/**
 * A JavaScript function that reproduce itself as a Quine program.
 * Copyright (c) 2017 Moshe Simantov
 */

const assert = require('assert');

const quine = (function () {
  var f = '(function () {%0A  var f = %27@%27;%0A%0A  return eval(unescape(f).replace(/@/, f));%0A})';

  return eval(unescape(f).replace(/@/, f));
});

const quineCode = quine.toString();

assert.equal(quineCode, quine().toString());
assert.equal(quineCode, quine()().toString());
assert.equal(quineCode, quine()()().toString());

console.log(`const quine = (${quineCode});`);