JSFiddle - React, Tailwind, and code Playground

CSS

#id_from_display_page {
    width: 500px;
    height: 150px;
    background-color: #2E90FF;
    border: 4px double aqua;
}

JavaScript

ad_found = false;
(function (window, document) {
    if (ad_found) {
        //run code to display ad
    } else {
        google_ad_client = "ca-pub-";
        /* Name */
        google_ad_slot = "-----";
        google_ad_width = "---";
        google_ad_height = "---";

        var head = document.createElement('div');
        head.id = "id_from_display_page";
        var script = '<script src="//pagead2.googlesyndication.com/pagead/show_ads.js" type="text/javascript"><\/script>';
        head.innerHTML = script;
        document.body.appendChild(head);
    }
})(this, this.document, undefined);