advisor-remover.js

//     Yandex-advisor remover
//     (c) 2015 Vladimir Samoylov
//     https://github.com/Leammas
//     You may freely distribute it under the MIT license.
(function() {

    var target;

    var checkerInterval = setInterval(function() {
        // select the target node, though it may be not presented on the page right now
        target = document.querySelector('body');
        if (!!target)
        {
            clearInterval(checkerInterval);

            // create an observer instance
            var observer = new MutationObserver(function(mutations) {
                mutations.forEach(function(mutation) {
                    if (
                        (
                            mutation.addedNodes.length === 1 &&
                                mutation.addedNodes[0].childNodes.length > 10 &&
                                mutation.addedNodes[0].childNodes[1].tagName == 'DIV'
                            ) &&
                            (
                                mutation.addedNodes[0].id.search(/^[a-z0-9]{13}$/i) === 0 || // old version
                                    mutation.addedNodes[0].id.indexOf('market_context_headcrab') > -1
                                )
                        ) {
                        var adviceId = mutation.addedNodes[0].id;
                        // From here on you can even type "THE BEST DEAL OVER MARKET" in advisor panel
                        var advisorElement = document.getElementById(adviceId);
                        // But I will just kill it with fire
                        advisorElement.parentNode.removeChild(advisorElement);
                        document.getElementsByTagName("body")[0].style.marginTop = "-38px";
                        // Bye advisor
                        observer.disconnect();
                    }
                });
            });

            // configuration of the observer:
            var config = { attributes: true, childList: true, characterData: true };

            // pass in the target node, as well as the observer options
            observer.observe(target, config);
        }
    }, 50);

})();