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Resizable

Panels people resize by dragging the line between them.

In Dense data

See it live​

Start Storybook to see it live: npm run storybook
Live from StorybookOpen Resizable in StorybookSee it in dark

When to use it​

In Dense data: Experts size the table and detail panes.

  • Use it when: Desktop tools where people choose how much space each panel gets.
  • Not when: Phones, or layouts with one obvious shape.

Instead:

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​

KeyboardWhat happensNot
undefinedThe handle can be focused and moved with arrow keys.undefined

Use it in code​

npx open-ds add resizable

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

Tokens it reads​

Resizable reads 7 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 Resizable's tokens to change Resizable 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.

PartIts token and the semantic it aliasesValue
Handle
Fill
Changes with theme		component.resizable.handle.backgroundcolor.border.defaultvar(--resizable-handle-background)Lightslate.light.200:#DDE2EADarkslate.dark.100:#262D38
Focus
on focus		component.resizable.handle.focusborder-width.focusvar(--resizable-handle-focus)border-width.2:2px
Focus ring focus
Changes with theme
on focus		component.resizable.handle.focus-ring-focuscolor.border.focusvar(--resizable-handle-focus-ring-focus)Lightviolet.light.600:#4B3FD9Darkviolet.dark.600:#A9A3F6
Focus ring offset focus
Changes with theme
on focus		component.resizable.handle.focus-ring-offset-focuscolor.surface.canvasvar(--resizable-handle-focus-ring-offset-focus)Lightslate.light.50:#F7F8FADarkslate.dark.0:#0D1117
Resizable
Heightcomponent.resizable.heightsize.iconvar(--resizable-height)size.16:1rem
Cornercomponent.resizable.radiusradius.badgevar(--resizable-radius)radius.0:0rem
Fill
Changes with theme		component.resizable.backgroundcolor.border.defaultvar(--resizable-background)Lightslate.light.200:#DDE2EADarkslate.dark.100:#262D38
From the system
Edge
Changes with theme		color.border.default
straight from the system, through --border		Lightslate.light.200 · #DDE2EADarkslate.dark.100 · #262D38