Chat UI
A chat UI joins messages, sender names, a writing box, send states, and attachments. It also shows ways to fix errors.
V.Which pattern are you building?
YouA compact picker with search.
A real example
An AI chat separates user and assistant messages. It streams replies, shows sources, and offers Stop and Retry.
Main parts
- 01Trigger or task context
- 02Primary control surface
- 03Feedback, focus, and dismissal
Use it when
Use it when taking turns in chat is the clearest way to finish the task.
Do not use it when
Never hide set steps, errors, permissions, or actions that can't be undone inside vague chat.
Name used in code
message list + composer + status Before you ship
Before release, check the page structure, keyboard access, visible focus, contrast, and zoom. Also check loading, empty, error, success, cancel, and reduced-motion states.
Outcome: Use Chat UI to solve this user need without losing the current context. User context: An AI chat separates user and assistant messages. It streams replies, shows sources, and offers Stop and Retry. Recommended pattern: Chat UI. Why it fits: Use it when taking turns in chat is the clearest way to finish the task. Do not use it when: Never hide set steps, errors, permissions, or actions that can't be undone inside vague chat. Product requirements: Define the default, loading, empty, error, success, and recovery states. Keep user input. Give clear feedback after every action. Accessibility and resilience: Use semantic HTML, full keyboard access, and visible focus. Make the layout work when zoomed and support reduced motion. Follow the project’s current rules. Do not add a new UI library unless the project already uses it. Acceptance criteria: The main task works with keyboard only and at 320px width. Focus and status changes are announced. Check loading, failure, retry, cancel, and reduced-motion paths. Evidence and limits (evidence boundary): No single official standard controls the whole term. Its meaning may change across teams, platforms, or frameworks. Unknowns to confirm: Product wording, data source, analytics events, supported devices and languages, and platform limits.
Check this request
Review the current use of Chat UI. Definition: A chat UI joins messages, sender names, a writing box, send states, and attachments. It also shows ways to fix errors. Release checks: Before release, check the page structure, keyboard access, visible focus, contrast, and zoom. Also check loading, empty, error, success, cancel, and reduced-motion states. Before changing code, report the evidence you found, gaps, severity, and the smallest safe fix.