Javascript error on SharePoint page

Question

Hi Team,
I'm updating a list column value by comparing a value of field from the same list using JS. It is working fine. But throwing javascript error on the page. 
Below is the snippet.
var web = null;
var clientContext = null;
var list = null;
var item = null;
var reviewStatus = null;
$(document).ready(function () {
setInterval(function () {
$Text = $("td.ms-cellstyle.ms-vb2:contains('No')");
$Text.parent().css("background-color", "#FFb3BD");
$("input[name='teamCheckbox']").change(function () {
var controlid = $(this).attr("id");
var parts = controlid.split('_');
var itemID = parts[1];
clientContext = new SP.ClientContext(_spPageContextInfo.webAbsoluteUrl);
var list = clientContext.get_web().get_lists().getById(_spPageContextInfo.pageListId);
item = list.getItemById(itemID);
clientContext.load(item);
clientContext.load(item, 'Status');
clientContext.executeQueryAsync(Function.createDelegate(this, LoadStatus), Function.createDelegate(this, onQueryFailed));
}, 900);
function LoadStatus() {
reviewStatus = item.get_item('Status');
if(reviewStatus)
item.set_item('Status', 0);
item.update();
clientContext.load(item);
clientContext.executeQueryAsync(Function.createDelegate(this, UpdateNo), Function.createDelegate(this, onQueryFailed1));
}else
item.set_item('Status', 1);
item.update();
clientContext.load(item);
clientContext.executeQueryAsync(Function.createDelegate(this, UpdateYes), Function.createDelegate(this, onQueryFailed1));
function onQueryFailed() {
alert("Request Failed at 1st asych");
function onQueryFailed1(){
alert("Request Failed at 2nd asynch");
function UpdateYes() {
//reviewStatus = null;
function UpdateNo()
//reviewStatus = null;
I'm getting the below JS error :
Message: The property or field has not been initialized. It has not been requested or the request has not been executed. It may need to be explicitly requested. URI: _layouts/15/sp.debug.js?rev=vK8qdKxCg9qccxdMK5Ebzg%3D%3D
$Q_2: function SP_ListItem$$Q_2($p0) {
var $v_0 = (this.get_fieldValues())[$p0];
if (SP.ScriptUtility.isUndefined($v_0)) {
throw Error.create(SP.ResResources.getString(SP.ResourceStrings.propertyHasNotBeenInitialized));
return $v_0;
I have tried by calling the 2nd async query by changing to item.get_Context(); doesn't helped me.
Please suggest how to kill this error...
Thanks,
Bharath P N
P N Bharath

Answer 1

Hi Dennis,
I had tried by updating the script. But it is failing in update the list item. Please let me know if i'm doing wrong?
$(document).ready(function () {
setInterval(function () {
$Text = $("td.ms-cellstyle.ms-vb2:contains('No')");
$Text.parent().css("background-color", "#FFb3BD");
$("input[name='teamCheckbox']").change(function () {
var controlid = $(this).attr("id");
var parts = controlid.split('_');
var itemID = parts[1];
var ctx = GetCurrentCtx();
var listName = ctx.ListTitle;
var url = _spPageContextInfo.webAbsoluteUrl;
var currentStatus = null;
var Status = null;
getListItemWithId(itemID, listName, url, function (data) {
if (data.d.results.length == 1) {
currentStatus = data.d.results[0].Status;
}, function (data) {
alert("Error in GetListItemwithID method");
if (currentStatus) {
Status = 0;
updateListItem(url, listName, itemID, Status, function () {
alert("Item updated, refreshing avilable items");
}, function () {
alert("Ooops, an error occured. Please try again");
} else {
Status = 1;
updateListItem(itemID, listName, url, Status, function () {
alert("Item updated, refreshing avilable items");
}, function () {
alert("Ooops, an error occured else loop. Please try again");
}, 900);
function getListItemWithId(itemId, listName, siteurl, success, failure) {
var url = siteurl + "/_api/web/lists/getbytitle('" + listName + "')/items?$filter=Id eq " + itemId;
$.ajax({
url: url,
method: "GET",
headers: { "Accept": "application/json; odata=verbose" },
success: function (data) {
success(data);
error: function (data) {
failure(data);
function GetItemTypeForListName(name) {
return "SP.Data." + name.charAt(0).toUpperCase() + name.split(" ").join("").slice(1) + "ListItem";
function updateListItem(itemId, listName, siteUrl, title, success, failure) {
var itemType = GetItemTypeForListName(listName);
var item = {
"__metadata": { "type": itemType },
"Status": title
getListItemWithId(itemId, listName, siteUrl, function (data) {
$.ajax({
url: data.d.results[0].__metadata.uri,
type: "POST",
contentType: "application/json;odata=verbose",
data: JSON.stringify(item),
headers: {
"Accept": "application/json;odata=verbose",
"X-RequestDigest": $("#__REQUESTDIGEST").val(),
"X-HTTP-Method": "MERGE",
"If-Match": data.d.results[0].__metadata.etag
success: function (data) {
success(data);
error: function (data) {
failure(data);
}, function (data) {
failure(data);
P N Bharath