By Vishal Basumatary in javascript — Mar 24, 2023

petShopIndex.html:137 Uncaught ReferenceError: $ is not defined jquery node

Dealing with the Error: "petShopIndex.html:137 Uncaught ReferenceError: $ is not defined jquery node"

If you are a website developer or designer, you might have come across a few errors while working with different programming languages, and jQuery is one of them. One of the most common errors that developers encounter while working with jQuery is "Uncaught ReferenceError: $ is not defined." Here's what you need to know about this error and how to fix it.

What does the error mean?

This error message usually appears in the console when the jQuery library is not loaded correctly, or it is not available for use. When you try to use a jQuery function, the browser cannot recognize it because the library is not available. This error can occur when:

The jQuery library is not linked correctly in your HTML file.
The URL of the jQuery library is incorrect, or it's not available.
The jQuery library is not loaded before the jQuery code.
The jQuery library is conflicting with other libraries or scripts.

How to fix the error?

To fix the "Uncaught ReferenceError: $ is not defined" error, you can try the following solutions:

Solution 1: Check your jQuery library link

The first solution is to check your jQuery library link. Ensure that you have linked to the correct URL for your jQuery library. If you don't have the jQuery library, you can download it directly from the official website and add it to your project file.

<head>
  <script src="jquery-3.6.0.min.js"></script>
</head>

Solution 2: Load jQuery before your code

The second solution is to ensure that you load the jQuery library before your code. Ensure that you include your jQuery link in your HTML file before your jQuery code. This will allow the browser to recognize the jQuery functions.

<head>
  <script src="jquery-3.6.0.min.js"></script>
  <script src="your_jquery_code.js"></script>
</head>

Solution 3: Use jQuery.noConflict()

If you are still encountering the error even after trying the above solutions, you can try using the jQuery.noConflict() method. This method allows you to use jQuery without conflicting with other libraries or scripts.

<head>
  <script src="other_library.js"></script>
  <script src="jquery-3.6.0.min.js"></script>
  <script>
    var $j = jQuery.noConflict();
    $j(document).ready(function() {
      // your jQuery code here
    });
  </script>
</head>

By using this method, you can avoid conflicts with other libraries and scripts that might be using the "$" sign as a variable.

Solution 4: Check for conflicts with other scripts

If the above solutions do not work, you may need to check if there are any conflicts with other scripts that might be using the "$" sign as a variable. Rename the "$" sign to another variable name and try again.

Conclusion

"Uncaught ReferenceError: $ is not defined" error is a common error that can occur while working with jQuery library. Ensure that you load your jQuery library correctly or try using the jQuery.noConflict() method to avoid conflicts with other libraries and scripts. Also, check for conflicts with other scripts and rename the "$" sign to another variable name to fix the error.