Files
smart-city-digital-twin-mar…/smart-app-city/frontend/node_modules/use-latest-callback
Eric FELIXINE e30ae8ed09 feat(smart-app): implement complete mobile app MVP
- App.tsx: full navigation (Auth stack + Main tabs with 5 screens)
- Auth: LoginScreen, RegisterScreen, ForgotPasswordScreen
- HomeScreen: dashboard with IoT metrics, weather widget, alerts, quick actions, sensors
- MapScreen: interactive map with layer toggles (6 layers)
- MarketplaceScreen: categories (6), products (5), search
- ChatScreen: AI chat with quick prompts (4), bot responses
- ProfileScreen: user info, stats, menu (9 items), logout
- AlertsScreen: alert list with severity, acknowledge
- SensorsScreen: sensor list with type filters (6 types), search
- ZonesScreen: zone cards with stats
- SettingsScreen: language picker (FR/EN/ES/DE), privacy, about
- Stores: iotStore (sensors, zones, alerts), notificationStore, uiStore + i18n
- Hooks: useSensors, useAlerts, useNotifications, useLocation
- Components: Card, Button, LoadingSpinner, ErrorBoundary, Header
- Services: iotService, notificationService (with axios API client)
- Utils: formatters (temp, AQI, noise, dates), validators (email, password, IBAN)
- Theme: colors.ts with full design system (Blue Ocean palette)
- Ditto: fixed MongoDB connection, new JWT secrets, official gateway image
2026-06-01 18:00:35 -04:00
..

use-latest-callback

React hook which returns the latest callback without changing the reference.

This is useful for scenarios such as event listeners where you may not want to resubscribe when the callback changes.

Installation

Open a Terminal in the project root and run:

npm install use-latest-callback

Usage

The useLatestCallback hook accepts a function as its argument and returns a function that preserves its reference across renders.

import useLatestCallback from 'use-latest-callback';

// ...

function MyComponent() {
  const callback = useLatestCallback((value) => {
    console.log('Changed', value);
  });

  React.useEffect(() => {
    someEvent.addListener(callback);

    return () => someEvent.removeListener(callback);
  }, [callback]);

  return <>{/* whatever */}</>;
}

It's important to note that the callback is not intended to be called during the render phase. Only call the callback in response to an event.