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Message scroller

A scrolling list of messages that keeps the newest in view.

In Accessible first

See it live​

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

When to use it​

In Accessible first: A live conversation where new messages arrive at the bottom. Not a static list, and no motion when less is asked.

  • Use it when: A live conversation where new messages arrive at the bottom.
  • Not when: A static list (a scroll area).

Instead:

Words​

  • Use common words. Explain any term you must use.
  • One idea per sentence. Put the action first.
  • Never blame the person.
  • Use: Continue, Change, Start, You. Avoid: Invalid, Utilise, Submit, Error code.

The labels components use, from the voice tokens:

  • content.action.commit: Continue
  • content.action.cancel: Go back
  • content.action.destroy: Delete
  • content.action.retry: Try again
  • content.action.empty-action: Start a new application

See Voice and tone for the whole voice.

Accessibility and keyboard​

Test before you ship:

  • New messages are announced politely without moving focus. undefined

Use it in code​

npx open-ds add message-scroller

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

Tokens it reads​

Message scroller reads 5 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 Message scroller's tokens to change Message scroller alone.

Changes with theme

Accessible first 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
Message scroller
Gapcomponent.message-scroller.gapspace.gap.groupvar(--message-scroller-gap)space.32:2rem
Cornercomponent.message-scroller.radiusradius.controlvar(--message-scroller-radius)radius.6:0.375rem
Focus
on focus		component.message-scroller.focusborder-width.focusvar(--message-scroller-focus)border-width.3:3px
Focus ring focus
Changes with theme
on focus		component.message-scroller.focus-ring-focuscolor.border.focusvar(--message-scroller-focus-ring-focus)Lightblue.light.600:#0B4FC0Darkblue.dark.600:#8AB4F8
Focus ring offset focus
Changes with theme
on focus		component.message-scroller.focus-ring-offset-focuscolor.surface.canvasvar(--message-scroller-focus-ring-offset-focus)Lightgray.light.50:#F7F7F7Darkgray.dark.0:#0A0A0A