Fieldset.
Semantically groups related form controls under one legend.
See it in context
What it is
In HTML, a fieldset and legend express a shared question or purpose for several controls. It is particularly useful for radio and checkbox sets where individual labels need a group context.
When to use it
Use a concise legend and keep individual control labels understandable within it.
Know the difference
A decorative border alone does not create the semantic group that a fieldset provides.
Across platforms
Web
Use a native button for an action and an anchor for navigation. Preserve keyboard activation and a visible focus indicator.
iOS · iPadOS · Android
Provide a comfortable touch target, use familiar system symbols when appropriate, and show a clear pressed or selected state.
macOS · Windows · Linux
Keep pointer, keyboard, and focus behavior consistent. Common commands can additionally expose a menu item or keyboard shortcut.
Go to the source
Primary documentation for the pattern and its platform conventions.