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Cart Transform Function

Modern Mattern Import Fee

A Shopify Cart Transform Function that applies a configurable import fee with gift-card and product exclusions and quantity-safe calculations.

DevelopmentEcomLabs ProductShopify Functions
Overview

EcomLabs is developing a Shopify Cart Transform Function that adds a configurable import fee to eligible cart items, with exclusions for gift cards and selected products and quantity-safe fee calculations.

What EcomLabs did

  • Engineering a Cart Transform Function to inject a configurable import fee.
  • Implementing gift-card and product exclusions from the fee.
  • Driving fee configuration through metafields.
  • Ensuring quantity-safe fee calculations across cart changes.

Capabilities

  • Applies a configurable import fee to eligible items.
  • Excludes gift cards and designated products.
  • Reads fee configuration from metafields.
  • Calculates fees safely regardless of item quantity.

Stack

  • Shopify Functions
  • JavaScript
  • GraphQL
  • Metafields
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