Error occurs when ASP.NET application is executed due to `Sys` being undefined

Currently, I am working on developing a Web Application using WebForms with ASP.NET. One of the functionalities involves loading a custom javascript script file through a ScriptManager.

However, upon viewing the page in a browser, I am encountering an issue where the intended action of displaying a timer is not happening. When I check the page source, I come across the following error message:

//<![CDATA[
if (typeof(Sys) === 'undefined') throw new Error('ASP.NET Ajax client-side framework failed to load.');
//]]>

To troubleshoot this problem, I have tried using the same javascript file in an ASP.NET Website and it works perfectly there. The issue only seems to occur when using it within a Web Application. Additionally, I inserted an alert into the javascript file and it functions correctly on both the Website and Web Application.

javascriptasp.net.netexceptionasp.net-ajax

Answer №1

There are a couple of reasons why this error may be happening.

The first possibility is that you have not included the ScriptManager. However, since you mentioned that you have already included it, the second reason could be that you need to rearrange your code so that the ScriptManager is placed before the "sys" call, allowing it to be accessed by the rest of the script and preventing this error from occurring.

To resolve this issue, consider moving the ScriptManager higher up in your code or placing your script below the ScriptManager.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

What is the process for incorporating a predefined language into Sitecore when adding an item?

Working on a Sitecore 6.5 project that involves multiple languages. I am trying to insert an item in the program code with a predefined language, like Dutch. After hours of searching online, I have been unable to find a solution. Can anyone provide guidan ...

c#asp.netsitecore

Nextjs google places autocomplete not providing accurate suggestions

I'm attempting to utilize Google autocomplete to retrieve the names of mosques specifically in the United Kingdom. However, the data I am receiving is global and not limited to mosques. Here is my code: import axios from "axios"; export def ...

javascriptgoogle-mapsnext.jsaxioscors

I'm having trouble getting jQuery to work properly with Bootstrap buttons

In simple terms, my objective is to have two buttons on a page where "1" is displayed when the first button is pressed and "2" is displayed when the second button is pressed. This functionality works fine with radio inputs, but when I incorporate button la ...

javascriptjqueryhtmltwitter-bootstrap

Basic Tallying Code in JavaScript

Hi, I am currently working on creating a basic counter using HTML / CSS and Javascript. Unfortunately, my Javascript code is not functioning correctly, even after trying various solutions found online. I attempted to include "async" but it appears that my ...

javascripthtml

Sort through an array of objects by their respective values within another array of nested objects

I am struggling to filter out positions from the positions array that are already present in the people array. Despite trying different combinations of _.forEach and _.filter, I can't seem to solve it. console.log(position) var test = _.filter(posi ...

javascriptlodash

Facing compatibility problems with JavaScript and Cascading Style Sheets in Google Chrome?

Welcome to the site . Let's address a couple of issues with JavaScript and CSS: Firstly, the JS code seems to be malfunctioning only in Chrome, throwing an error that reads: 'Uncaught TypeError: Object [object Object] has no method 'on prij ...

javascriptjquerycss

Why is the size of my array shrinking with every iteration of the for-loop in JavaScript?

I am struggling to change the classname of three elements that share the same classname. Unfortunately, as I loop through my array, it seems to decrease in size with each iteration, preventing me from successfully changing all three elements. Any advice or ...

javascripthtmlarrays

The splice function in Angular is mistakenly removing a different record instead of the intended one that was

An issue with the Angular splice function is causing it to delete the wrong record. Here is the code snippet in question. Within the code below, when attempting to delete the record labeled "Pat," the code ends up deleting the record labeled "Max." Please ...

javascriptangularjs

what is the best way to display a chosen value in a dropdown menu using jQuery?

How can I display a value from a database in a select option? This code is written in PHP, JSON, AJAX, and JQUERY. $(document).on('click', '.edit_data', function () { var shop_id = $(this).attr("id"); $.ajax({ url: "&l ...

javascriptphpjquerymysqlajax

The component is converting a controlled text input to become uncontrolled

There's an error warning popping up, saying "A component is changing a controlled input of type text to be uncontrolled." I'm more used to class components, so functional components are new to me. All I did was: First, I set an initial state for ...

javascripthtmlreactjs

Accessing JavaScript results in PHP

Hello everyone! I am working on creating a dropdown menu for selecting time using JavaScript to get the computer's current time. My goal is to have an output that automatically selects the option in the dropdown if it matches the computer's time. ...

phpjavascripthtml

How can I retrieve x-data from an external file using Alpine.js?

I recently started exploring Alpine.js and grasped the fundamentals, but I'm facing challenges when trying to move functions outside of inline script tags. Consider this snippet from index.html: <div x-data="{ loading: false }"/> &l ...

javascriptalpine.js

What is the advantage of using a foreach loop to overwrite values instead of returning all values?

Here is an array that needs to be stored in local storage when the DOM is created. this.headers.push( { text: "Name", align: "center", sortable: true, value: "name", align: "start&q ...

javascriptarraysvue.jsvuejs2local-storage

Removing an item from an array while also updating one of its attributes in JavaScript

I am facing a challenge with this list of objects: const flights = [ { id: 00, to: "New York", from: "Barcelona", cost: 700, scale: false }, { id: 01, to: "Los Angeles", from: "Madrid", cost: 1100, scale: tru ...

javascriptarraysobjectproperties

Creating a query string using a jQuery array that contains multiple values for a query variable

After writing some code to convert an array into a filter string, I noticed that the generated string was not in the format I wanted. product_size=123&product_size=456 Instead of this, I needed it to be product_size=123+456. To achieve this, I reali ...

javascriptjqueryarrays

Populate an array with a series of dates, verify their accuracy, and determine the highest value within

Below are some input fields: <input type="text" name="date_1" class="dataList" value="2009-12-30" /> <input type="text" name="date_2" class="dataList" value="2007-06-12" /> <input type="text" name="date_3" class="dataList" value="2009-10-23 ...

javascriptjqueryhtmlarraysvalidation

Bespoke HTML helper dropdown selection box

Here's a snippet I have: @Html.DropDownList("consultations", Model.ConsultationsTruncated, new { @class = "form-control", @id = "consultations" }) The displayed texts are truncated: For instance string s = "Hello everybody" ==> Text ="Hel..." ...

c#html.netasp.net-mvcrazor

The AjaxFileUpload1_UploadComplete event is failing to trigger when a query string is included in the page URL

I am working with the AjaxFileUpload1 component from the Ajax Control Toolkit. In my setup, I pass a query string to the page where the AjaxFileUpload1 control is used. For example, on a page like WebForm1.aspx?Key=22. The issue arises when I try to pas ...

c#asp.netajaxajaxcontroltoolkit

Managing JSON responses in the client-side view technology of SpringMVC

I have been struggling to implement the following scenario using Spring MVC. I am encountering issues and unable to determine the correct approach. My implementation involves jsonRequest/jsonResponse (Restful Web services). 1. I have a SignUP.jsp Form wit ...

javajavascriptajaxjsonspring-mvc

Storing information in memory through the use of Javascript

i am interested in keeping this type of data consistently in memory. app_id admin_id url status 123 1 xyz.com 1 123 2 xyz.com 0 539 3 exmaple.com 1 876 4 new.com ...

javascriptnode.js