Create an instance of jQuery object

instance-of-jquery-object.js

const arr = [];
const jQuery = function( selector, context ) {
  return new jQuery.fn.init( selector, context );
}
jQuery.fn = jQuery.prototype = {version: 2};
jQuery.fn.init = function( selector, context, root ) {  
  this[ 0 ] = document.querySelector(selector);
  return this;
}
jQuery.fn.init.prototype = {
  constructor: jQuery,
  push: arr.push,
  pushStack: 2
};
console.log(jQuery('div'));