Customizing Shopify Plus checkout with Functions (Checkout Rules Pro)
Shopify Plus checkout will not let a theme hide Cash on Delivery. Payment and delivery customizations are Shopify Functions. Checkout Rules Pro stores the rules as JSON on a metafield and lets the Function read them at checkout. No theme code. No metafield, no operations. Payment methods Each rule names a method and an action. The Function lowercases the name and looks for a payment method whose name contains it. “Cash on Delivery” matches a hide rule for “cash on delivery.” ...