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無料 ARIA Notifyスニペットジェネレーター

aria-liveフォールバック付きのプログラムによるスクリーンリーダー通知のためのariaNotify()呼び出しを生成します。

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ARIA Notifyスニペットジェネレーターとは

The ARIA Notify API (Chrome 141+) provides a programmatic way to announce dynamic content changes to assistive technology. Instead of creating and managing aria-live regions manually, you call ariaNotify('message', { priority, duration, silent }). The API handles the announcement queue, priority ordering, and Promise-based completion. This replaces the common pattern of toggling aria-live region textContent to trigger screen reader announcements.

クイックアンサー

Use ariaNotify('message', { priority, duration }) to programmatically announce content to screen readers. Returns a Promise that resolves when the announcement completes. Chrome 141+. Fallback: use aria-live regions for older browsers.

制限事項

The ARIA Notify API is Chrome 141+ only. Firefox and Safari do not support it yet. A fallback to traditional aria-live regions is required for cross-browser accessibility.
ariaNotify() requires user activation for important priority announcements — the call must be within a user gesture (click, keypress) or the priority is downgraded to normal.
Multiple rapid notifications can be coalesced or dropped by the browser. The API is designed for occasional dynamic announcements, not streaming real-time updates.

使い方

Choose the notification message and priority level (normal, important, or none).
Set the duration in milliseconds or 0 for manual clearing.
Call ariaNotify() at the appropriate trigger point (form submit, async completion, etc.).
Include a fallback to aria-live regions for browsers that don't support the API.

主な用途

Announce form submission results to screen reader users after an AJAX save completes.
Notify users of new content loaded via infinite scroll or live updates.
Alert assistive technology users when a timer expires or a background task completes.

用途

使用例

例

Form submission feedback

A form submits via fetch(). After the response, ariaNotify('Form saved successfully', { priority: 'normal' }) announces the result to screen readers. The user doesn't need to navigate to a status message — the announcement comes to them.

例

Live content update announcement

A dashboard loads new data every 30 seconds. After each update, ariaNotify('Dashboard updated with 5 new items', { priority: 'none', silent: true }) provides a background notification that doesn't interrupt the current screen reader output.

よくあるミス

Calling ariaNotify() too frequently — rapid notifications can overwhelm screen reader users. Queue important ones and debounce non-critical updates.
Using ariaNotify() for user-triggered actions that already have native feedback — button clicks and form submissions often have built-in screen reader feedback.
Forgetting to include a fallback for older browsers — the API is Chrome 141+ only, so keep an aria-live region as a fallback for Firefox and Safari users.

検証

Enable a screen reader (VoiceOver, NVDA, or ChromeVox) and trigger the ariaNotify call. Confirm the message is announced correctly.
Test with a non-supporting browser (Firefox) to verify the aria-live region fallback announces the message.

FAQ

ARIA NotifyスニペットジェネレーターのFAQ

How is ariaNotify different from aria-live regions?

ariaNotify() is a programmatic API — you call it directly in JavaScript when you want to announce something. aria-live regions are DOM elements that announce whenever their text content changes. ariaNotify() handles queuing, priority, and timing automatically. aria-live regions require manual DOM manipulation and can be fragile — duplicate announcements, missed updates, and timing issues are common.

What do the priority levels mean?

normal announcements wait for the current screen reader output to finish before playing. important announcements interrupt the current output immediately. none (silent) notifications don't interrupt but are available for the user to review later. Use important sparingly — only for critical alerts like errors or time-sensitive warnings.

When does the ariaNotify Promise resolve?

The Promise resolves when the assistive technology has finished announcing the message. If no screen reader is active, it resolves immediately. This lets you chain announcements or perform actions after the user has heard the message. await ariaNotify('Saved') ensures the next announcement doesn't overlap.