React Native Passkeys with Expo (2026): WebAuthn, Associated Domains, and Credential Manager
Ship WebAuthn passkeys in React Native with Expo dev-builds, Associated Domains on iOS, Credential Manager on Android, and server-side verification.
Tutorials
Step-by-step learning guides
React Native Memory Profiling with Hermes: Heap Snapshots, Leaks, and Retainers in Expo (2026)
Capture heap snapshots from a Hermes-powered React Native app in Expo, read retainer paths in Chrome DevTools, and catch the three most common leaks with numbers, traces, and CI regression tests.
expo-maps Tutorial 2026: Native Apple Maps and Google Maps for React Native
Ship native Apple Maps and Google Maps in a React Native app with expo-maps: install the config plugin, render your first map, drop markers, handle camera events, and decide when to stay on react-native-maps.
React Native iOS Home Screen Widgets with Expo (2026): apple-targets, WidgetKit, and App Groups
Ship iOS home screen widgets from an Expo React Native app using @bacons/apple-targets. Covers App Groups, SwiftUI layouts, App Intents on iOS 17+, deep-linking, and the debugging traps that eat weekends.
React Native BLE Tutorial with Expo (2026): react-native-ble-plx and Config Plugin
A practical, hands-on guide to Bluetooth Low Energy in React Native with Expo and react-native-ble-plx v3: dev builds, iOS/Android permissions, scanning, GATT services, characteristic reads/writes, notifications, and background reconnection.
Expo File System Next: File and Directory Classes for React Native (2026)
Expo File System Next in SDK 54 replaces the legacy async URI API with File, Directory, and Paths classes. Here is the full setup, sync vs async guide, and legacy migration playbook.
React Compiler for React Native in 2026: Auto-Memoization, Expo Setup, and Real Performance Numbers
The React Compiler ships stable in React 19.2 and works with Expo SDK 55 and React Native 0.83. Setup steps, real performance traces from three production screens, bailout debugging, and a rollout checklist.
Expo Router API Routes in 2026: Server Endpoints on EAS Hosting
Build server endpoints inside your Expo app with +api.ts handlers, then ship them on EAS Hosting. Covers server output, dynamic segments, auth, middleware, env vars, testing, and honest limits.
Expo EAS Workflows Tutorial: CI/CD for React Native without GitHub Actions in 2026
A React Native lead engineer's hands-on guide to Expo EAS Workflows: the YAML-based CI/CD system for building, submitting, and OTA-updating your app without GitHub Actions. Includes a full production workflow file, monorepo setup, secrets handling, and a comparison table.
React Native WebView Tutorial with Expo (2026): postMessage, JavaScript Injection, and Security
Learn how to add a WebView to your Expo React Native app in 2026. This guide covers install, postMessage bridging, safe JavaScript injection, cookies, file uploads, debugging with Chrome DevTools, and the security defaults every production app needs.
React Native Vision Camera Frame Processors: Real-Time ML Kit OCR and Face Detection in Expo (2026)
Ship real-time ML Kit face detection and OCR in an Expo development build using React Native Vision Camera v5 frame processors, runAsync, and worklets.
React Native Edge-to-Edge on Android 15 with Expo: SafeAreaView, StatusBar, and Insets in 2026
Fix React Native edge-to-edge on Android 15 with Expo. Learn SafeAreaProvider, useSafeAreaInsets, expo-status-bar, and expo-navigation-bar patterns.