Field validation overview
IntroductionAnchor link to section titled "Introduction"
Field validation at checkout can enable merchants to block customers from proceeding in the checkout when they haven't met certain conditions. For example, a merchant can prevent customers from checking out if the customer tries to ship to a PO box, or if the customer is less than 18 years old.
This tutorial describes how to gather and validate user input using checkout UI components, and then block customer progress in the checkout.
- Get started building a checkout UI extension.