Adblocker Detection

readme.md

Simple Adblocker Detection

This is a simple vanilla JS adblocker detection script. It is inspired by an article by Christian Heilmann, but there a few differences, mostly for performance reasons:

• The HTML div element is not created on the fly via JavaScript.
• The HTML div element is not being removed after script execution.
• The HTML div element occupies no space, since it is positioned absolutely.
• A simple Google Analytics call has been added.

ph-blokr-detection.js

/**
 * @author Kim-Christian Meyer <kim.meyer@palasthotel.de>
 * @see https://www.christianheilmann.com/2015/12/25/detecting-adblock-without-an-extra-http-overhead/
 */
;"use strict";

(function() {
    window.addEventListener('load', function() {
        var test = document.getElementById('ad12345');
        if (test.offsetHeight === 0) {
            document.body.classList.add('adblocker');
            ga('send', 'event', 'AdBlockerDetection', 'adblocker', null, null);
        }
        else {
            document.body.classList.add('no-adblocker');
            ga('send', 'event', 'AdBlockerDetection', 'no-adblocker', null, null);
        }
    });
})();

somewhereinfooter.html

<div class="ad adsbox" id="ad12345" style="position: absolute; width: 0; height: 1px; overflow: hidden"></div>