Fix Guide
Shopify Cart Not Working
A broken cart stops customers progressing to checkout. Cart issues can range from items not adding, quantities not updating, to the cart drawer not opening. These are typically caused by JavaScript conflicts or theme-level errors.
Common causes
- JavaScript errors in the theme cart implementation
- Theme bugs introduced by updates or manual code edits
- App conflicts modifying cart AJAX endpoints
- Cart drawer or slide-out panel CSS or script errors
- Liquid template errors in cart template files
Quick checks
- 01Check browser console for JavaScript errors on the cart page
- 02Test adding a product to cart in an incognito window
- 03Disable recently installed apps and retest
- 04Revert to a previous theme version if recently updated
- 05Test with the default Shopify Dawn theme to isolate the issue
When to get expert help
If the issue persists after completing these checks, deeper investigation is required. Complex issues often involve code-level conflicts that cannot be resolved without direct store access.