Remove UTM params from query

remove_utm.js

(function () {
    // remove url param
    function removeUrlParam(url, paramName) {
        var pattern = new RegExp('\\b(' + paramName + '=).*?(&|$)');
        if (url.search(pattern) >= 0) {
            return url.replace(pattern, '');
        }
        return url;
    }

    var replaceList = [
        'utm_email',
        'utm_referrer',
        'utm_domain',
        'utm_company',
        'utm_fullname',
        'utm_firstname',
        'utm_lastname',
        'utm_channel',
    ];
    var url = window.location.href;
    for (var index = 0; index < replaceList.length; index++) {
        url = removeUrlParam(url, replaceList[index]);
    }

    var url_parts = url.split('?');
    url = url_parts[1] ? url : url_parts[0];
    
    // check if the push history exists
    window.history.pushState && window.history.pushState(null, null, url);
})();