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Topic
Form UX, validation boundaries, field errors, submissions, stale edits, and recovery behavior.
Practice items tagged with Forms and Validation.
Creates a resource through an explicit request DTO and returns typed 201, 409, and validation outcomes.
Explains how client-side validation, server-side validation, DTOs, domain rules, and user feedback work together.
Explains stale edit detection, row versioning, conflict UI, refresh behavior, and safe update contracts.
Explains field-level and form-level error mapping from API responses into a usable frontend form experience.
Produces field-keyed validation errors through one reusable endpoint boundary.