Meter
A meter shows one measurement inside a known range. It can also mark low, high, and best ranges.
Meter compares a known value with a bounded scale.
A real example
A storage panel shows 82 GB used out of 100 GB. The high mark is 80 and the best range is below 60. Text also says “82 GB of 100 GB,” so color is not the only warning. An upload uses a progressbar instead.
Main parts
- 01Known range
- 02Current measurement
- 03Thresholds and optimum
Use it when
Use it for a current value, such as storage, a score, or signal strength, when the limits have real meaning.
Do not use it when
Do not use it for task progress, a value with no limit, or a value people change directly.
Name used in code
meter value min max low high optimum 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 Meter to solve this user need without losing the current context. User context: A storage panel shows 82 GB used out of 100 GB. The high mark is 80 and the best range is below 60. Text also says “82 GB of 100 GB,” so color is not the only warning. An upload uses a progressbar instead. Recommended pattern: Meter. Why it fits: Use it for a current value, such as storage, a score, or signal strength, when the limits have real meaning. Do not use it when: Do not use it for task progress, a value with no limit, or a value people change directly. 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): The standard covers only the listed scope. It does not choose the visual style, product decision, or Vibulary example. Unknowns to confirm: Product wording, data source, analytics events, supported devices and languages, and platform limits.
Check this request
Review the current use of Meter. Definition: A meter shows one measurement inside a known range. It can also mark low, high, and best ranges. 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.