Title: JavaScript Error Breaking Add-to-Cart Functionality
Last modified: September 22, 2025

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# JavaScript Error Breaking Add-to-Cart Functionality

 *  Resolved [moebelboss](https://wordpress.org/support/users/bigmoebelboss/)
 * (@bigmoebelboss)
 * [8 months, 2 weeks ago](https://wordpress.org/support/topic/javascript-error-breaking-add-to-cart-functionality/)
 * Hello Support Team,
 * we are experiencing a critical issue on our WooCommerce store when using your
   plugin **Variation Swatches for WooCommerce**. After activating the plugin, the
   shopping cart functionality breaks and throws the following error in the browser
   console:
   add-to-cart.min.js?ver=10.1.2:1 Uncaught TypeError: t(…).addClass(…).
   fadeTo(…).block is not a function at String.<anonymous> (add-to-cart.min.js?ver
   =10.1.2:1:3103) at n.each (jquery-1.11.0.min.js?ver=6.8.2:2:3023) at a.updateFragments(
   add-to-cart.min.js?ver=10.1.2:1:3038) at a.onAddedToCart (add-to-cart.min.js?
   ver=10.1.2:1:3812) at HTMLBodyElement.dispatch (jquery-1.11.0.min.js?ver=6.8.2:
   3:8066) at r.handle (jquery-1.11.0.min.js?ver=6.8.2:3:4767) at Object.trigger(
   jquery-1.11.0.min.js?ver=6.8.2:3:7167) at HTMLBodyElement.<anonymous> (jquery-
   1.11.0.min.js?ver=6.8.2:3:14925) at n.each (jquery-1.11.0.min.js?ver=6.8.2:2:
   2969) at n.fn.init.each (jquery-1.11.0.min.js?ver=6.8.2:2:845)This error prevents
   the **Add to Cart** action from working properly. The issue seems to be related
   to a conflict between `add-to-cart.min.js` and jQuery (`jquery-1.11.0.min.js`).
   We would appreciate your urgent assistance as this issue directly affects sales.

Viewing 1 replies (of 1 total)

 *  Plugin Support [fizanzvai](https://wordpress.org/support/users/fizanzvai/)
 * (@fizanzvai)
 * [8 months, 2 weeks ago](https://wordpress.org/support/topic/javascript-error-breaking-add-to-cart-functionality/#post-18652349)
 * Hi,
 * Thanks for reaching out to us.
 * WordPress Core already offers jQuery by default. The current version of jQuery
   is **3.7.1**. Can I ask why you are adding the jQuery again, when [it is a core library of WordPress](https://developer.wordpress.org/reference/functions/wp_enqueue_script/#default-scripts-and-js-libraries-included-and-registered-by-wordpress)?
 * Additionally, you haven’t shared a link where we can check the issue.
 * Please remove the additional jQuery or identify the conflict by deactivating 
   all the plugins except the WooCommerce and Variation Swatches for WooCommerce.
   Then check how it goes.
 * You can also [connect with us here](https://getwooplugins.com/tickets/) for a
   deep inspection.
 * Thank You

Viewing 1 replies (of 1 total)

The topic ‘JavaScript Error Breaking Add-to-Cart Functionality’ is closed to new
replies.

 * ![](https://ps.w.org/woo-variation-swatches/assets/icon-256x256.gif?rev=3157951)
 * [Variation Swatches for WooCommerce](https://wordpress.org/plugins/woo-variation-swatches/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/woo-variation-swatches/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/woo-variation-swatches/)
 * [Active Topics](https://wordpress.org/support/plugin/woo-variation-swatches/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/woo-variation-swatches/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/woo-variation-swatches/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [fizanzvai](https://wordpress.org/support/users/fizanzvai/)
 * Last activity: [8 months, 2 weeks ago](https://wordpress.org/support/topic/javascript-error-breaking-add-to-cart-functionality/#post-18652349)
 * Status: resolved