Bottom Sheet
A bottom sheet is a touch-friendly panel. It rises from the bottom and may stop at set heights.
A real example
Phone map filters open in a draggable sheet. It can peek, fully open, or close.
Main parts
- 01Trigger
- 02Anchored or modal surface
- 03Focus boundary
- 04Dismiss path
Use it when
Use it for choices on a phone when the scene above should remain visible.
Do not use it when
Never copy it to desktop when a popover or drawer would work better.
Name used in code
Sheet / snap points Before you ship
Move focus on purpose. Keep it inside only when the overlay blocks the page. Support Escape and a visible close button, then return focus to the opener. Keep entered data and check small-screen, loading, and failure states.
Outcome: Use Bottom Sheet to solve this user need without losing the current context. User context: Phone map filters open in a draggable sheet. It can peek, fully open, or close. Recommended pattern: Bottom Sheet. Why it fits: Use it for choices on a phone when the scene above should remain visible. Do not use it when: Never copy it to desktop when a popover or drawer would work better. 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 Bottom Sheet. Definition: A bottom sheet is a touch-friendly panel. It rises from the bottom and may stop at set heights. Release checks: Move focus on purpose. Keep it inside only when the overlay blocks the page. Support Escape and a visible close button, then return focus to the opener. Keep entered data and check small-screen, loading, and failure states. Before changing code, report the evidence you found, gaps, severity, and the smallest safe fix.