When building forms with Zod and React, delivering a smooth user experience is just as important as robust validation. One effective strategy is to provide real-time feedback as users interact with form fields. By validating input as soon as a user leaves a field or even on each keystroke, you help users correct mistakes early, reducing frustration and preventing them from submitting invalid forms. This approach not only makes your forms feel responsive but also guides users toward successful completion. Additionally, always disable the submit button or prevent submission altogether if validation errors exist. This ensures that invalid data never reaches your backend and users are clearly informed about what needs to be fixed before they can proceed.

Clear and accessible error messaging is crucial for everyone, including users with disabilities. Use concise, specific language to describe each error, such as "Email address is required" instead of a generic "Invalid input". Visually, make error messages prominent and associate them directly with the relevant form fields. For accessibility, ensure that error messages are announced by screen readers. You can do this by using ARIA attributes like aria-live="polite" on error containers and linking errors to fields with aria-describedby. Good contrast and readable font sizes also help all users notice and understand errors quickly. By focusing on clarity and accessibility, you create forms that are usable and welcoming for everyone.