JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://esprima.org/esprima.js"></script>
<script src="http://esprima.org/test/3rdparty/escodegen.browser.js"></script>

JavaScript

(function (window) {
    'use strict';
    Array.prototype.contains = function (item, from) {
        return this.indexOf(item, from) != -1;
    };
    if (!esprima) {
        throw 'Esprima not loaded';
    }

    if (!escodegen) {
        throw 'Escodegen not loaded';
    }
    var JSTypes = ['String', 'Boolean', 'Number', 'Null', 'Array', 'Null', 'Undefined'];
    var anonymousFunctionRegx = /function(?:[\s\S]*?)\(/m;
    var allowedOperators = '+ - * / << >> ~'.split(' ');
    var allowedBinary = '+ - * / << >>'.split(' ');
    var allowedUnary = '~'.split(' ');
    var Callee = esprima.parse('that.__operator__(op,lval,rval);').body[0].expression.callee;

    function traverse(node, func) {
        func(node);
        for (var key in node) {
            if (node.hasOwnProperty(key)) {
                var child = node[key];
                if (typeof child === 'object' && child !== null) {
                    if (typeOf(child) == 'Array') {
                        for (var i = 0; i < child.length; ++i) {
                            traverse(child[i], func);
                        }
                    } else {
                        traverse(child, func);
                    }
                }
            }
        }
    }

    function typeOf(obj) {
        return Object.prototype.toString.call(obj).slice(8, -1);
    }

    function toCallExp(node) {
        var operatorNode = {
            'type': 'Literal',
                'value': node.operator,
                'raw': JSON.stringify(node.operator)
        };
        if (node.type == 'BinaryExpression' || node.type == 'LogicalExpression') {
            node['arguments'] = [operatorNode, node.left, node.right];
        } else if (node.type == 'UnaryExpression' || node.type == 'UpdateExpression') {
            var prefixNode = {
                'type': 'Literal',
                    'value': node.prefix,
                    'raw': JSON.stringify(node.prefix)
            };
            node['arguments'] =...