A simple closure for detecting AdBlock without additional HTTP requests

adBlockDetect.js

/**
 * A simple closure for detecting AdBlock without additional HTTP requests
 * 
 * Heavily inspiried by Christian Heilmann's work here: https://www.christianheilmann.com/2015/12/25/detecting-adblock-without-an-extra-http-overhead/
 */

window.adBlockDetect = (function() {
    var enabled;

    var callback = function(args) {
        if (args.length == 1 && typeof args[0] === "function") {
            args[0](enabled);
        }
    };

    var poll = function(args) {
        if (typeof enabled === "undefined") {
            // Wait for check function to complete
            setTimeout(function() {
                poll(args);
            }, 105);
            return;
        }
        // Check completed, do callback
        callback(args);
    };

    (function() {
        // Assess adblock usage
        var test = document.createElement("div");
        test.innerHTML = " ";
        test.className = "adsbox";
        document.documentElement.appendChild(test);
        window.setTimeout(function() {
            if (test.offsetHeight === 0) {
                enabled = true;
            } else {
                enabled = false;
            }
            test.remove();
        }, 100);
    })();

    return function() {
        poll(arguments);
    };
})();

/**
 * Example usage
 */
adBlockDetect(function(r) {
    if(r)
    {
      alert("AdBlocked!");
    }
});