Nan

There are moments in every developer’s life when JavaScript forces you to question the fundamental nature of reality. Today, we’re diving into one of the most existentially disturbing features of the language: the fact that NaN (literally “Not a Number”) is, according to JavaScript, actually a number. console.log(typeof NaN); // "number" Let that sink in for a moment. The thing that is explicitly named “Not a Number” is classified as a number. It’s like JavaScript is gaslighting us at the language level. ...