JSFiddle - React, Tailwind, and code Playground

HTML

<script>
  var startMs = Date.now();

  function log(msg) {
  	console.log('[PH_LOG] ' + (Date.now() - startMs) + ' ms – ' + msg);
  }
  
  var PREBID_TIMEOUT = 1000;

  var googletag = googletag || {};
  googletag.cmd = googletag.cmd || [];

  function initAdserver() {
    if (pbjs.initAdserverSet) {
      log('init ad server: already initialized');
    	return;
    }
    (function() {
      var gads = document.createElement('script');
      gads.async = true;
      gads.type = 'text/javascript';
      var useSSL = 'https:' == document.location.protocol;
      gads.src = (useSSL ? 'https:' : 'http:') +
        '//www.googletagservices.com/tag/js/gpt.js';
      var node = document.getElementsByTagName('script')[0];
      node.parentNode.insertBefore(gads, node);
      log('script tag for loading gpt.js added to DOM');
    })();
    pbjs.initAdserverSet = true;
  };
  setTimeout(function() {
    log('prebid timeout, calling init ad server');
  	initAdserver();
  }, PREBID_TIMEOUT);

  var pbjs = pbjs || {};
  pbjs.que = pbjs.que || [];
  (function() {
    var pbjsEl = document.createElement("script");
    pbjsEl.type = "text/javascript";
    pbjsEl.async = true;
    pbjsEl.src = "//acdn.adnxs.com/prebid/not-for-prod/prebid.js";
    var pbjsTargetEl = document.getElementsByTagName("head")[0];
    pbjsTargetEl.insertBefore(pbjsEl, pbjsTargetEl.firstChild);
    log('script tag for loading prebid.js added to DOM');
  })();

  pbjs.que.push(function() {
    var adUnits = [{
      code: 'div-gpt-ad-1438287399331-0',
      sizes: [
        [300, 250],
        [300, 600]
      ],
      bids: [{
        bidder: 'appnexus',
        params: {
          placementId: '10433394'
        }
      }, {
        bidder: 'pubmatic',
        params: {
          publisherId: 'TO ADD',
          adSlot: 'TO ADD'
        }
      }]
    }, {
      code: 'div-gpt-ad-1438287399331-1',
      sizes: [
        [728, 90],
        [970, 90]
      ],
      bids: [{
        bidder: 'appnexus',
   ...