instanceof operator instanceof instanceof instanceof instanceof According to MDN instanceof instanceof instanceof seeÂ inÂ MDN instanceof instanceof Operators/instanceof seeÂ inÂ MDN instanceof instanceof instanceof seeÂ inÂ MDN seeÂ inÂ MDN instanceof instanceof instanceof instanceof – JavaScript | MDN instanceof instanceof operator instanceof instanceof operator instanceof instanceof instanceof – JavaScript | MDN seeÂ inÂ MDN instanceof