JSFiddle - React, Tailwind, and code Playground

JavaScript

document.write('<pre>');

alert(window.HTMLPreElement);

console.log('HTMLPreELement' in window);

Object.getOwnPropertyNames(window)
    .forEach(function(v, x) {
        if (v === 'HTMLPreElement')
            document.write('<h2>' + v + '</h2>');
        else
            document.writeln(v);
    });


document.write('</pre>');