Uncaught ReferenceError: $ is not defined
To solve this error:
In the following code, you can see that the jQuery library is loaded after the script. So, you will get "$ is not defined" error.
There can be multiple other reasons for this issue:
In situations where you may find yourself working offline and encountering difficulties loading jQuery from an internet-based Content Delivery Network (CDN) due to connectivity issues, a prudent approach is to download the jQuery.js file and utilize it locally. To achieve this, you can employ the following code snippet to load jQuery from a local source:
By specifying the correct path to your locally stored jQuery.js file within the src attribute of the <script> tag, you can ensure that jQuery is loaded and utilized locally, mitigating potential connectivity problems associated with CDN-based loading.
Conflict with Other Libraries
Path to jQuery library you included is not correct
You might have put an incorrect path to jQuery library , or there may be typo in your file.
The above code does not include the HTTP: or HTTPS: in the src attribute but the browser, FireFox, needed it so you should changed it to:
The jQuery library file is corrupted
If the jQuery library file has been downloaded from an untrustworthy sites and the file is corrupted, this error may happen.