Error Caused by AJAX: The variable $ has not been defined

I'm encountering an issue with a small script on my HTML page. It's a function that should be triggered by an onclick method in an anchor tag, but it's not working. Every time I click on the link in the browser, the console shows "ReferenceError: $ is not defined" and highlights the third line of the code below.

<script>
    function del(urlToDelete) {
        $.ajax({
            url: urlToDelete,
            type: 'DELETE',
            success: function(results) {
                location.reload();
            }
        });
    }
</script>

Answer №1

To achieve this, make sure to add the jquery library first. Here is an example: Include the following script tag at the beginning, then use $.ajax to run your code.

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

Answer №2

It appears that the necessary jQuery libraries are missing from your project setup.

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

Answer №3

Previous responses utilized the http version, which may not be permitted in a production environment. Instead, consider using:

<script
          src="https://code.jquery.com/jquery-3.4.1.min.js"
          integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="
          crossorigin="anonymous"></script>

Alternatively, you can visit:

Answer №4

If you are extracting code snippets from Bootstrap (and maybe other sources), chances are it's the slim version that doesn't have ajax included. For a full version, choose between "uncompressed" or "minified" at .

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