pattern-library 1 linked patterns checked
U.S. Web Design System Site Alert Component
Documents site alerts for urgent sitewide information, critical system notifications, every-page display, full-width top placement, avoiding stacked alerts, restrained emergency color, labelled regions, and ARIA role choice for dynamic updates.
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Pattern Decisions This Source Supports
| Pattern | Supported decision | Required contract | Claim note |
|---|---|---|---|
| Site alert | Choose site alert when urgent sitewide information must appear by default on every affected page near the top of the site. | The site alert appears before ordinary page content and is reachable from any affected route, not just the home page. | USWDS defines site alerts for urgent sitewide information, critical system notifications, every-page display, full-width top placement, stacking avoidance, color restraint, labelled regions, and dynamic ARIA roles. |
Comparisons supported by this source
- Site alert vs banner vs notification banner vs alert
USWDS defines site alerts as urgent sitewide messages displayed across every page near the top, with guidance for stacking, color restraint, and dynamic ARIA roles.
Evidence Role
This source is treated as pattern-library evidence. Its value comes from the specific claims and setting described above.
Publisher: U.S. Web Design System. Last checked: .