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Real-Time Sync

المزامنة الفورية

IntermediateData & Storage1 min read
real-time-syncrealtimelive-data
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Definition

Live data updates pushed to connected clients automatically when data changes.

تحديثات البيانات المباشرة تُدفع إلى العملاء المتصلين تلقائياً عند تغيير البيانات.

Why It Matters

A live counter showing how many users are viewing a glossary term right now would use Firestore onSnapshot.

عداد حي يُظهر عدد المستخدمين الذين يشاهدون مصطلح القاموس الآن سيستخدم Firestore onSnapshot.

Full Definition

Real-time sync means clients receive data changes from the server instantly without refreshing or polling. Firestore's onSnapshot() listener subscribes to a query and re-runs the callback whenever matching documents change. This powers live counters, chat, collaborative editing, and live dashboards without WebSocket code.
المزامنة الفورية تعني أن العملاء يتلقون تغييرات البيانات من الخادم فوراً دون تحديث أو استطلاع.

Example Usage

“A live counter showing how many users are viewing a glossary term right now would use Firestore onSnapshot.”

“عداد حي يُظهر عدد المستخدمين الذين يشاهدون مصطلح القاموس الآن سيستخدم Firestore onSnapshot.”

Knowledge Graph

AI Builder Tips

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Avoid these mistakes when using Real-Time Sync:

1

Forgetting to unsubscribe from onSnapshot listeners when a component unmounts → Store the unsubscribe function returned by onSnapshot and call it in useEffect's cleanup function.

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Ready-to-Use Prompt
Help me build a project using Real-Time Sync.

Explain:
1. What is Real-Time Sync and why it matters
2. The core architecture and required tools
3. Step-by-step implementation plan
4. Common mistakes to avoid: Forgetting to unsubscribe from onSnapshot listeners when a component unmounts → Store the unsubscribe function returned by onSnapshot and call it in useEffect's cleanup function.
5. Best practices and production tips

Official Resources

No official documentation link on file for Real-Time Sync yet.

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