loading: Announce fullscreen LoadingBlanket assertively

[stowball]

We discovered that the fullscreen LoadingBlanket wasn't being announced in JAWS and NVDA in yourgov and other implementations. Making it role="alert" fixes it in these and makes no difference to the others.

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Checklist

Preflight

• Prefix the PR title with the slug of the package or component - e.g. accordion: Updated padding or docs: Updated header links
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Testing

• Manually test component in various modern browsers at various sizes (use Browserstack)
• Manually test component in various devices (phone, tablet, desktop)
• Manually test component using a keyboard
• Manually test component using a screen reader
• Manually tested in dark mode
• Component meets Web Content Accessibility Guidelines (WCAG) 2.1 standards
• Add any necessary unit tests (HTML validation, snapshots etc)
• Run yarn test to ensure tests are passing. If required, run yarn test -u to update any generated snapshots.

[changeset-bot]

🦋 Changeset detected

Latest commit: 2097cee

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@ag.ds-next/react	Patch

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

PR Preview Action v1.4.8
Preview removed because the pull request was closed.
2025-01-05 22:41 UTC