🔸 TL;DR
▪️ A small React hook to track online/offline status in real time 🛜
▪️ Great for resilient UX: banners, disabling actions, retry/sync 🔁
▪️ Remember: “online” ≠ “internet is reachable” ⚠️
🔸 WHY THIS HOOK EXISTS
Ever shipped a form that fails silently when the user loses connectivity? 😅
This tiny hook lets your UI react instantly to browser online/offline changes: show a banner 🚧, disable submit 🧾, pause sync 🔄, etc.
🔸 THE HOOK (CODE SNIPPET)
🔸 HOW TO USE IT
▪️ Show an offline banner 🚫📶
▪️ Disable “Submit” when offline 🛑
▪️ Queue actions and replay when back online 🧰
▪️ Trigger a “resync” when the user reconnects 🔄
Example:
🔸 IMPORTANT NOTE (DON’T OVERPROMISE) ⚠️
▪️ navigator.onLine + online/offline events reflect network connectivity, not guaranteed “internet access” (captive portals, DNS issues, flaky Wi-Fi…).
▪️ For critical flows, combine this with a lightweight “ping” (e.g., fetch("/health")) ✅
🔸 TAKEAWAYS
▪️ Listen to online/offline once, cleanup listeners properly ✅
▪️ Build network-aware UI patterns (queue, retry, sync) 🧠
▪️ Add an optional server check for high-stakes actions 🔍
#react #javascript #webdev #frontend #hooks #pwa #ux #softwareengineering #resilience #performance
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