https://coderrob.com/tags/frontend/Recent content in Frontend on CoderrobHugoen-USWed, 01 Mar 2023 18:00:00 -0600https://coderrob.com/posts/decoupling-ui-messaging-from-backend-error-codes-in-web-applications/Wed, 01 Mar 2023 18:00:00 -0600https://coderrob.com/posts/decoupling-ui-messaging-from-backend-error-codes-in-web-applications/<p>Users need human-readable error messages. Software needs stable, machine-readable error identifiers.</p> <p>Neither should have to parse the other.</p> <p>That is the boundary I want when building error handling for a web application. The backend should explain <strong>what failed</strong> in a predictable structure. The presentation layer should decide <strong>how that failure is presented</strong> to the person trying to finish a task.</p> <p>In a smaller application, that presentation layer may be the browser. In an enterprise application, it may include a backend for frontend (BFF), a shared message catalog, or a localization service. The deployment diagram can change without changing the boundary.</p>