export interface PWAUpdateToastProps {
    /**
     * Force the toast on/off. Omit to let the component listen for
     * `burdenoff:pwaUpdateReady` itself (e.g. pass `usePWA().hasUpdate` when the
     * shell already owns a `usePWA()` instance).
     */
    hasUpdate?: boolean;
    message?: string;
    actionLabel?: string;
    /** Override the reload action (default: `window.location.reload()`). */
    onReload?: () => void;
    className?: string;
}
/**
 * PWAUpdateToast — persistent "Update ready" snackbar for installed PWAs.
 *
 * Self-contained on purpose: it needs no provider and does NOT call `usePWA()`
 * (which registers/polls the service worker — a second instance would duplicate
 * that work). It listens for the shell-native `burdenoff:pwaUpdateReady` event,
 * or renders from the `hasUpdate` prop when the shell already has a `usePWA()`.
 *
 * Shells mount it once, near the root:
 * ```tsx
 * <PWAUpdateToast />
 * ```
 * `AppShellProvider` shells already get an update banner from
 * `PWAInstallBanner`; mount this only in shells that don't use that provider,
 * or that want the snackbar treatment instead.
 *
 * DOM contract: `[data-pwa-update-toast]`, safe-area aware, sits above the
 * mobile tab bar via `--mobile-tabbar-height`.
 */
export declare function PWAUpdateToast({ hasUpdate, message, actionLabel, onReload, className, }: PWAUpdateToastProps): import("react/jsx-runtime").JSX.Element | null;
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