JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
  <head>
    <title>test</title>
  </head>
  <body>
<textarea id="script" rows="24" cols="80" style="font-family: Monaco, Consolas, 'Courier New', monospace; color: white; background: #333333;"></textarea>
<br />
<input id="result" type="text" disabled="disabled"></input>
<button id="submit">Test</button>
<script>
// 2012-03-02
// Syntax checker setup
// From "Top Down Operator Precedence" by Douglas Crockford
// <javascript.crockford.com/tdop/index.html>
// Make a new object that inherits members from an existing object.
if (typeof Object.create !== 'function') {
    Object.create = function(o) {
        function F() {}
        F.prototype = o;
        return new F();
    };
}

// Transform a token object into an exception object and throw it.
Object.prototype.error = function(message, t) {
    t = t || this;
    t.name = "SyntaxError";
    t.message = message;
    console.log(t);
    throw t;
};
// 2012-03-01
// GS tokenizer
// Based off of a similar code (c) 2006 by Douglas Crockford
// <http://javascript.crockford.com/tdop/tokens.js>
// Multi-character operators.
String.prototype.tokenize = function() {
    var c; // Current character
    var from; // Token starting index
    var i = 0; // Current index
    var line = 1; // Current line
    var length = this.length;
    var n; // Numerical value
    var q; // Terminal quote
    var str; // Token string value
    var mco = ['xor', 'NL', 'TAB', 'SPC',
                     'in', ':=', '+=', '-=', '@=',
                     '*=', '/=', '%=', '^=', '<=',
                     '>=', '==', '!=', '<>', '=<',
                     '=>', '&=', '|=', '&&', '||',
                     '<<', '>>', '++', '--', '::',
                     'new'];
    var result = []; // An array of the resultant tokens
    var make = function(type, value) {
        // Make a token object.
        return {
            type: type,
            value: value,
            from: from,
            to: i,
            line: line
  ...