JSFiddle - React, Tailwind, and code Playground

JavaScript

var adfoxPlaceholderId = 'placeholder',
    adfoxWindow = window,
    adfoxDocument = window.document,
    adfoxPlaceholder = adfoxDocument.getElementById(adfoxPlaceholderId);
    try {
      while((adfoxPlaceholder == null) && (adfoxWindow != window.top)){
        adfoxWindow = adfoxWindow.parent;
        adfoxDocument = adfoxWindow.document;
        adfoxPlaceholder = adfoxDocument.getElementById(adfoxPlaceholderId);
      }
    } catch(ex) {
      alert('catch-block');
    }