JSFiddle - React, Tailwind, and code Playground

by kayen

JavaScript

var ALPHABET = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
var input = 'ABOZ'; // returns true
//var input = 'ABOZ12'; //returns false

alert((ALPHABET.match(new RegExp((input.split('').join('|')), 'g'))).length == input.length)