3 Ways To Solve Jquery - Uncaught Referenceerror: $ Is Non Defined Error

If you lot are using jQuery, Angualr JS or plainly one-time JavaScript together with getting "Uncaught ReferenceError: $ is non defined" error which agency $ is either a variable or a method which you lot are trying to utilization earlier declaring it using var keyword. In jQuery, it's a curt hollo of jQuery() business office together with most usually used inwards $(document).ready(function()). If you lot are doing around jQuery materials when DOM is loaded together with getting this error it agency your browser has a work loading jQuery library either from the cyberspace or local file system. In this article, you lot volition run into around of the most mutual reasons of "Uncaught ReferenceError: $ is non defined" error together with how to solve them, but earlier that let's acquire around basic virtually the dreaded Uncaught ReferenceError: $ is non defined error.


One of the mutual argue of such error is straight starting amongst jQuery without knowing JavaScript fundamentals. I receive got seen many spider web developers which comes from Java, C#, HTML, together with Python background, started using jQuery without knowing much virtually JavaScript.

If you lot rate off to piece of work on same scenario, I strongly advise you lot to read atleast i of the expert JavaScript mass for beginners e.g. Head First JavaScript. Always think that jQuery is a library built on JavaScript, i time you lot know JavaScript, it's much easier to troubleshoot whatsoever jQuery error.

Uncaught ReferenceError: X is non defined

Since JavaScript executes within browser, your browser similar FireFox, Chrome, Edge or Internet Explorer throws this error when you lot are using a variable which is non defined, for example, next code volition ce this error, but i time you lot declare the variable using var keyword, the error volition acquire away:

data; // ReferenceError: information is non defined var data; data; // No to a greater extent than errors

Similarly, if you lot access a method earlier declaring it you lot volition acquire this error every bit shown below:

process(); // ReferenceError : procedure is non defined process = function(){}; process(); // No errors

Now that you lot receive got learned when does browser throws Uncaught ReferenceError: $ is non defined, it's fourth dimension to hold off at around mutual reasons this error occurs spell using jQuery, AngularJS or other JavaScript library which uses $ every bit a shortcut.

1) One of the most mutual argue of "ReferenceError: $ is non defined" inwards jQuery based application is that jQuery plugin is included earlier jQuery file. Since jQuery plugin uses $, it throw "ReferenceError: $ is non defined" if it doesn't find, which is logical because jQuery was non loaded until then.

<script src="/lib/jquery.plugin.js"></script> <script src="/lib/jquery.min.js"></script>

Solution: Include the jquery.js file earlier whatsoever jQuery plugin files.

<script src="/lib/jquery.min.js"></script> <script src="/lib/jquery.plugin.js"></script>

2) The minute most mutual argue of getting "ReferenceError: $ is non defined" inwards jQuery is due to the wrong path, either it's a typo or jQuery file is moved to another location, the browser is non able to charge the jQuery file.

One solution of this work is but to cook the path to jQuery library. If you lot are downloading jQuery from CDN thence you lot tin give the axe too utilization Google hosted jQuery file, which is almost e'er available.


3) Another bizarre but a mutual argue of "ReferenceError: $ is non defined" inwards jQuery" is that you lot mightiness hold out working offline but loading jQuery from internet. It's i of the featherbrained fault every spider web
developer makes it sometime or other. Solution is simple, either connect to cyberspace or utilization a local re-create of jQuery library every bit shown below:

<script src="/js/jquery.min.js"></script>

That's all virtually how to cook the "Uncaught ReferenceError: $ is non defined" inwards jQuery. You tin give the axe follow similar approach to whatsoever other JavaScript library which is using $ every bit shortcut. Most of the cases mentioned hither too applicable to mutual libraries similar AngularJS together with others every bit well.

Further Reading
here)

How to acquire electrical current URL Parameter using jQuery? (solution)

How to utilization multiple jQuery Date picker chemical gene inwards i HTML page? (answer)

10 Examples of jQuery selectors for Web Developers (tutorial)

How to redirect spider web page using jQuery code? (answer)

3 Ways to parse HTML using JSoup inwards Java? (solution)

How to reload/refresh a page using jQuery? (answer)

How to foreclose double submission of POST information using JavaScript? (solution)

How to alteration multiple elements inwards i acquire inwards jQuery? (example)

How to cheque together with uncheck checkboxes using jQuery? (tutorial)

Thanks for reading this article thence far. If you lot similar this article thence delight portion amongst your friends together with colleagues. If you lot receive got whatsoever query or uncertainty thence delight drib a comment.