Popover

Rich content in a floating panel, opened by click.

In Dense data

See it live

Start Storybook to see it live: npm run storybook

Live from StorybookOpen Popover in StorybookSee it in dark

When to use it

In Dense data: Filters next to the column.

• Use it when: Extra detail or a small control next to what it explains, on any device.
• Not when: A one-line hint (tooltip), or a task that should block the page (dialog).

Instead:

• Tooltip: A one-line hint on hover.
• Dialog: A blocking task.

Words

• Lead with the object, then the state: "Alert 2041 contained."
• Use numbers, not words for numbers.
• One verb per button. No "please", no exclamation marks.
• Use: Investigate, Filter, Assign, Escalated, Resolved. Avoid: Oops, Awesome, Please, Simply.

The labels components use, from the voice tokens:

• content.action.commit: Save
• content.action.cancel: Cancel
• content.action.destroy: Delete
• content.action.retry: Retry
• content.action.empty-action: Change filters

See Voice and tone for the whole voice.

Accessibility and keyboard

Keyboard	What happens	Not
undefined	Escape closes it and returns focus.	undefined

Test before you ship:

• The trigger says it opens a panel and whether it is open. undefined

Use it in code

npx open-ds add popover

The component reads only component keys and semantic tokens, so it follows the brand and mode on <html>.

Tokens it reads

Popover reads 10 tokens of its own, each an alias of a semantic token. Each row is one part: its own token, the semantic it aliases, and the value it ends at. Change a semantic and every component that reads it follows; override one of Popover's tokens to change Popover alone.

Changes with theme

Dense data decides what changes when you switch theme. Here a switch changes colors only, so the marked rows differ between light and dark; everything else holds steady.

Part	Its token and the semantic it aliases	Value
Shared
Transition panels duration	component.transition.panels-durationmotion.duration.panelsvar(--transition-panels-duration)	duration.fast:120ms
Content
Corner	component.popover.content.radiusradius.controlvar(--popover-content-radius)	radius.2:0.125rem
Fill Changes with theme	component.popover.content.backgroundcolor.surface.raisedvar(--popover-content-background)	Lightslate.light.0:#FFFFFFDarkslate.dark.100:#262D38
Padding	component.popover.content.paddingspace.inset.containervar(--popover-content-padding)	space.16:1rem
Text Changes with theme	component.popover.content.labelcolor.text.primaryvar(--popover-content-label)	Lightslate.light.900:#161B23Darkslate.dark.900:#F7F8FA
Shadow Changes with theme	component.popover.content.shadowelevation.overlayvar(--popover-content-shadow)	Lightshadow.overlayDarkshadow.overlay-dark
Header
Gap	component.popover.header.gapspace.gap.tightvar(--popover-header-gap)	space.4:0.25rem
Text size	component.popover.header.font-sizetype.body.font-sizevar(--popover-header-font-size)	font.size.14:0.875rem
Title
Weight	component.popover.title.font-weighttype.label.font-weightvar(--popover-title-font-weight)	font.weight.500:500
Description
Text Changes with theme	component.popover.description.labelcolor.text.mutedvar(--popover-description-label)	Lightslate.light.600:#535D6DDarkslate.dark.400:#969FAD
From the system
Edge Changes with theme	color.border.default straight from the system, through --border	Lightslate.light.200 · #DDE2EADarkslate.dark.100 · #262D38