Length of string in JavaScript

Question

The following string returns a length of 20 in Javascript, but why?

8080!\u001b[22m\u001b[32m\u001b[39m

Answer 1

\u001b is the Unicode value for Escape which is counted as a single character. With that in mind, the length is 20.

Answer 2

Your strings contains unicode escaped characters, this is the string character by character (using split):

var str = '8080!\u001b[22m\u001b[32m\u001b[39m';

console.log(str.split(''));