471a9daaa6
SW cache-first rewrite, React.lazy code splitting, PWA types/test stubs, install prompt, offline banner, offline queue, ChatPanel wiring. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
26 lines
738 B
TypeScript
26 lines
738 B
TypeScript
import { useEffect, useState } from "react";
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/**
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* Reactive online/offline status hook.
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* Returns true when navigator.onLine is true (and updates reactively).
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*/
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export function useOnlineStatus(): boolean {
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const [isOnline, setIsOnline] = useState(() =>
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typeof navigator !== "undefined" ? navigator.onLine : true,
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);
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useEffect(() => {
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const handleOnline = () => setIsOnline(true);
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const handleOffline = () => setIsOnline(false);
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window.addEventListener("online", handleOnline);
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window.addEventListener("offline", handleOffline);
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return () => {
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window.removeEventListener("online", handleOnline);
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window.removeEventListener("offline", handleOffline);
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};
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}, []);
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return isOnline;
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}
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