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What to do if jQuery script is not loaded?
First you need to make sure that jQuery script is loaded. This could be from a CDN or local on your website. If you don’t load this first before trying to use jQuery it will tell you that jQuery is not defined. This could be in the HEAD or in the footer of the page, just make sure you load it before you try to call any other jQuery stuff.
When to run JavaScript before or after jQuery?
You have JavaScript running before the page is fully loaded, and as such, before jQuery is fully loaded. First of all, ensure, what script is call properly, it should looks like and shouldn’t have attributes async or defer.
How to fix jQuery is not defined in JavaScript?
When you try the javascript closure => jQuery is not defined. Thanks @tabirkeland, that did it for me! I’m no JavaScript wizard, could you explain why $ would be available globally but not jQuery, even though they are both being assigned to window? I also had this same problem and the above fixed.
Are there any conflicts between jQuery and other libraries?
As a general rule, global objects are stored inside the jQuery namespace as well, so you shouldn’t get a clash between jQuery and any other library (like prototype.js, MooTools, or YUI). That said, there is one caveat: by default, jQuery uses $ as a shortcut for jQuery.
What happens if jQuery is not defined in JavaScript?
jQuery is not defined: Common causes and a simple solution. One of the most common JavaScript errors we see affecting our customers is #jQuery is not defined. This can be a pretty serious problem if your web app relies on jQuery (73% of all sites!), since if jQuery fails to load, it can make your JavaScript code unusable.
How to fix jQuery is not defined error in WordPress?
In order to fix it, use the keyboard Ctrl + U to access the source code. Then you can analyze and find any reference to jQuery. One of them should clearly have a problem. Here are some approaches that we propose to help you with those coding problems:
What does 404 mean when jQuery is not defined?
If not, it will be highlighted red and will say “404” beside it. If the file is loading properly, that means that the issue is number 2. Make sure all jQuery javascript code is being run inside a code block such as: