Javascript Loading a workflow on column change

HiddenDeliveryDate.js

$(document).ready(function() {

    document.getElementById("ctl00_ctl42_g_c46573bc_6049_45fc_a2f8_09c5196e69d1_ctl00_toolBarTbl_RightRptControls_ctl00_ctl00_diidIOSaveItem").addEventListener("click", function(){
    	var dateonsubmit = document.getElementById("DeliveryMonth_934d5445-bd6e-4fc9-a9e9-958e063dd203_$DateTimeFieldDate").value;
		var datebeforesubmit = localStorage.getItem("initialDate");

        if(datebeforesubmit != dateonsubmit){
				var listItemId = getQueryStringParameter('ID');
                
                var jqDeferred = $.ajax(startWorkflow(listItemId, 'ecb75086-2b01-4454-bdd3-1caeee89c62c'));

                jqDeferred.then(function(response, statusText, xhrObj) {
                    alert("ok");
                }, function(xhrObj, textStatus, err) {
                    alert("no");
                })

	    }
		});

    var initialdate = document.getElementById("DeliveryMonth_934d5445-bd6e-4fc9-a9e9-958e063dd203_$DateTimeFieldDate").value;
	localStorage.setItem("initialDate",initialdate);
});

function startWorkflow(itemID, subID) {
        var context = SP.ClientContext.get_current();
        var web = context.get_web();
        var wfServiceManager = SP.WorkflowServices.WorkflowServicesManager.newObject(context, web);
        var subscription = wfServiceManager.getWorkflowSubscriptionService().getSubscription(subID);

        context.load(subscription);
        
        context.executeQueryAsync(
        function(sender, args){
            console.log("Subscription load success. Attempting to start workflow.");        
            var inputParameters = {};
            wfServiceManager.getWorkflowInstanceService().startWorkflowOnListItem(subscription, itemID, inputParameters);

            context.executeQueryAsync(
                function(sender, args){ alert("Starting workflow"); },
                function(sender, args){ 
                    alert("Failed to start workflow.");
                    console.log("Error: " + args.get_message() + "\n" + args.get_stackTrace());
                }
            );
        },
        function(sender,args){
            alert("Failed to load subscription.");
            console.log("Error: " + args.get_message() + "\n" + args.get_stackTrace());
        }
        );
    
}


function getQueryStringParameter(p) {
    var params =
            document.URL.split("?")[1].split("&");
    var strParams = "";
    for (var i = 0; i < params.length; i = i + 1) {
        var singleParam = params[i].split("=");
        if (singleParam[0] == p)
            return singleParam[1];
    }

}