Gracefully handles page redirects in SharePoint

SP.Redirect.js

/*
 * Created by Rajiv Gomer
 * Released under the MIT license
 * Date: 2018-01-11
 * Tested using SharePoint 2013/16/19 Classic Mode
 * Parameters:  1.  URL (string, Required)
 *              2.  Url Title (Default: URL)
 *              3.  Timer (Integer, Default: 10)
 *              4.  Override (boolean, Default: false, true makes the countdown timer clickable to stop the redirect)
 * Usage:       1.  SP.Redirect("<Required string: URL>") 
 *              2.  SP.Redirect("<Required string: URL>","<string: TEXT FOR LINK>")
 *              3.  SP.Redirect("<Required string: URL>","<string: TEXT FOR LINK>", <int: Seconds>)
 *              4.  SP.Redirect("<Required string: URL>","<string: TEXT FOR LINK>", <int: Seconds>, <boolean: override>)
 */

;(function(){
    var pageRedirect = function(url,title,delay,override){
    title = title || url;
    override = override || false;
    var count = delay || 10,
        modaltitle = "Redirecting",
        modalbody = "<div> Redirecting to: <br><a href='" + url + "'>" + title + "</a></div><br>You will be redirected in: <div id='countdownTimer' style='cursor:pointer;'>" + count + "</div>",
        dialog = SP.UI.ModalDialog.showWaitScreenWithNoClose(modaltitle,modalbody),
        timer = function(){
            if(--count < 0){
                clearInterval(counter);
                dialog.close();
                window.location.replace(url);
            }
            else{
                if(count > 60){
                    counterDiv.innerText = Math.floor(count/60).toString() + ":" + (count%60 < 10 ? "0" + Math.floor(count%60).toString() : Math.floor(count%60).toString());
                    }
                else{
                    counterDiv.innerText = "0:" + (count < 10 ? "0" + count.toString() : count.toString());

                }
            }
        },
        counterDiv = document.getElementById('countdownTimer');
        if(override){
            counterDiv.style.cursor = "pointer";
            counterDiv.onclick = function(){ clearInterval(counter); dialog.close();}
        }
        else{
            counterDiv.style.cursor = "default";
        }
        var counter = setInterval(timer,1000);
    }
        
    if(_v_dictSod['sp.ui.dialog.js'].state === Sods.loaded){
        SP.prototype.Redirect = pageRedirect;    
    }
    else{
        RegisterSod("sp.res.resx", "/_layouts/15/ScriptResx.ashx");
        RegisterSod("sp.ui.dialog.js", "/_layouts/15/sp.ui.dialog.debug.js");
        RegisterSodDep("sp.ui.dialog.js", "sp.res.resx");
        RegisterSod("sp.js", "/_layouts/15/sp.debug.js");
        RegisterSodDep("sp.js", "sp.runtime.js");
        RegisterSodDep("sp.js", "sp.ui.dialog.js");
        RegisterSodDep("sp.js", "sp.res.resx");

        SP.SOD.executeFunc('sp.ui.dialog.js',false,function(){
            SP.prototype.Redirect = pageRedirect;
        });
    }
}());