Overview
If clicking “Add to Cart” on your storefront sends customers to the Shopify cart page instead of opening the Upcart drawer, it’s usually due to a simple configuration issue. This guide walks through the most common causes and how to resolve them.
Common causes
The cart redirect is usually triggered by one of the following:
Upcart settings – certain compatibility settings may be disabled
Theme settings – the theme may force a redirect by default
App conflicts – another app could be controlling the cart behavior
Step-by-step troubleshooting
Follow these steps in order. Test the cart after each step to check if the issue is resolved.
1. Update your Upcart settings
Go to:
Upcart > Cart Editor > Settings
Enable Enhanced AJAX API Compatibility
This prevents conflicts with third-party themes or apps that interfere with the cart behavior. It also improves how Upcart listens for product add events.
2. Check your Shopify theme settings
Go to:
Shopify Admin > Online Store > Themes > Customize > Theme Settings > Products
Look for the setting labeled “Enable cart redirection” and turn it off.
This setting, when enabled, automatically redirects customers to the cart page after clicking Add to Cart, bypassing Upcart entirely.
3. Review other installed apps
Some apps like ReCharge, WideBundle, Bold, or CartKit may override cart behavior.
In each app’s settings:
Look for a toggle like “Redirect to Cart” or “Go to Cart After Add”
Change it to Stay on Page or Do Nothing
If you’re unsure whether an app is interfering, contact the app developer or their support team to confirm Upcart compatibility.
Testing as you go
After each fix:
Add a product to your cart
Confirm whether Upcart opens the drawer or if you’re still redirected
Only move to the next step if the issue persists
This will help isolate what’s causing the conflict.
If it’s still not working
If you’ve completed all steps above and Upcart still doesn’t open, try the following:
Switch to a default theme
Temporarily enable a Shopify base theme like Dawn
Activate Upcart and test the Add to Cart behavior
If it works in Dawn but not in your current theme, the issue is theme-related
Disable other cart-related apps one by one
Turn off one app at a time and test the cart each time. If Upcart works after disabling a specific app, you’ve identified the conflict.
Use browser developer tools
Press F12 (or right-click → Inspect)
Go to the Console and Network tabs
Look for error messages or failed script loads (especially from
add.js)Check if another app’s script is overriding or hijacking the Add to Cart behavior
When to contact support
If the issue persists after completing all steps, gather the following before reaching out:
Your current theme name and version
A list of cart-related apps you’re using
Any error messages from your browser console
Send this information to the Upcart support team via in-app chat for faster troubleshooting.
Summary
This issue is almost always caused by one of three things:
A theme or app is forcing cart redirects
Upcart’s compatibility setting is off
Another script is hijacking the add-to-cart behavior