Enqueue jquery for TypeError: $.browser is undefined issue

Enqueue jQuery for TypeError: $.browser is undefined issue#

If you are encountering the TypeError: $.browser is undefined issue, it may be because you are using an older version of jQuery that doesn't support the $.browser function. To fix this, you need to enqueue a newer version of jQuery that has the $.browser function.

Step 1: Check the version of jQuery#

You can check the version of jQuery being used on your website by opening your website in a browser and opening the developer console. In the console, type in:

jQuery.fn.jquery

This will return the version of jQuery being used on your website.

Step 2: Choose a newer version of jQuery#

Choose a version of jQuery that has the $.browser function. Versions of jQuery below 1.9.0 have the $.browser function, but it was removed in newer versions due to performance issues. You can download the latest version of jQuery from the official website: https://jquery.com/download/.

Step 3: Enqueue the newer version of jQuery#

To enqueue the newer version of jQuery, you need to add the code to your theme's functions.php file. Open your theme's functions.php file and add the following code:

function enqueue_jquery() {
    wp_enqueue_script( 'jquery', 'https://code.jquery.com/jquery-3.5.1.min.js', array(), '3.5.1', true );
}
add_action( 'wp_enqueue_scripts', 'enqueue_jquery' );

In this code, we are enqueuing jQuery version 3.5.1 from the official jQuery CDN. Replace the jQuery script URL with the URL of the jQuery version you downloaded in Step 2.

Save the functions.php file and refresh your website. The newer version of jQuery should now be loaded on your website, and the TypeError: $.browser is undefined issue should be fixed.