Variant Picker issue not working or price not changing after choosing different price

Technical Q&A
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Topic summary

A Shopify store owner reports that variant selection is not updating product prices on their site. When customers choose different variants and add items to cart, the default price and product appear instead of the selected variant.

Key Details:

  • Issue affects both price display and cart functionality
  • Recent changes involved Google and Facebook ads setup with shipping condition modifications
  • Store URL: www.karmas.ch

Diagnosis:

  • A developer identified a JavaScript error causing the price update failure (shown in attached screenshot)
  • The error requires code debugging to resolve
  • Developer requested collaborator access to investigate further

Status: Unresolved. The issue appears to be a code-related bug rather than a temporary glitch, as refreshing the page does not fix the problem. Investigation is needed to determine if recent changes or added code caused the error.

Summarized with AI on October 28. AI used: claude-sonnet-4-5-20250929.
1

Screenshot 2025-05-06 at 18.55.14.jpg
Screenshot 2025-05-06 at 18.55.14.jpg916×771 53.6 KB

I have noticed that my products are not changing price after choosing different variants. Even when I select a variant where the price don’t change, after clicking add to cart. it shows the default price and product in the cart and not the changed one. The only big changes or work I did recently was the google and fb ads. where I needed to change some shipping conditions.

any help would be greatly appreciated.

2

Please share your store url.

Also try refreshing the page after you change a variant to see if changes are taking place after a refresh.

Could be a temporary issue or could probably be a bug in code.

Best

Shadab

3

Thank you very much for ur attention. www.karmas.ch

4

I haven’t checked the others but at least the price not changing on variant change is due to this error

Shadab_dev_0-1746609673698.png
Shadab_dev_0-1746609673698.png1277×438 110 KB

Will need to debug this and will need collab access to the store. Please reach out via personal links below for a convenient conversation and collaboration. Also you sure you or anyone changed any code in the code editor or even added any code?