Inline status messaging: what went wrong, what needs attention, what changed. The reference implementations live in admin-heavy systems.
Also appears as: Banner · Alert · Error summary · Inline notification
Inline status messaging with severity tiers, dismissal, and explicit content slots for action and link.
Read the Backpack breakdown
Top-of-page accessible error pattern with focus management.
Read the GOV.UK Design System breakdown
The reference example for inline status messaging in admin UIs.
Read the Polaris breakdownStatus messages with severity, dismissal, and primary-action support.
Read the Primer breakdownThe official U.S. government banner pattern, reused across federal sites.
Read the U.S. Web Design System breakdown