React Native 0.83 Arrives with React 19.2, Enhanced DevTools, and Performance APIs

What’s New in React Native 0.83

Today marks the release of React Native 0.83, a milestone update that brings React 19.2, powerful new DevTools features, and stable support for Web Performance APIs along with an Intersection Observer API (currently in Canary). For the first time in React Native’s history, this release introduces no user-facing breaking changes, making it a smoother upgrade for developers.

React 19.2 Integration

React Native 0.83 ships with React 19.2, delivering two important new APIs: <Activity> and useEffectEvent. These additions give developers more granular control over component lifecycle and side-effect dependencies.

The <Activity> Component

The <Activity> component allows you to organize your app into distinct “activities” that can be toggled between visible and hidden modes. When set to hidden, the component’s children are unmounted from the DOM (effects are cleaned up), and all updates are deferred until React has no higher-priority work. This is an excellent alternative to conditional rendering for scenarios where you want to preserve the state of a hidden tree. For example, if a user has performed a search and selected an item, switching to another activity and back will restore that exact state automatically.

The visible mode behaves like normal rendering—children are mounted, effects run, and updates are processed immediately. You can learn more about <Activity> in the React documentation.

useEffectEvent Hook

Another common pain point in React is managing useEffect dependencies when you only want to react to an external event, not every change in the closure. The new useEffectEvent hook solves this by letting you extract the “event” logic from your effect, so the effect itself only depends on the data it needs to re-run for. This prevents accidental re-executions while keeping the linter happy and your code predictable. For more details, check the React documentation on useEffectEvent.

DevTools Upgrades: Network and Performance Panels

React Native DevTools receives two long-awaited features in this release: Network Inspection and Performance Tracing. These tools are now available for all React Native applications out of the box.

• Network Inspection enables you to view all network requests made by your app, including headers, payloads, and response bodies. This is invaluable for debugging API calls, caching behavior, and authentication flows.
• Performance Tracing lets you record and analyze runtime performance, identify bottlenecks, and optimize rendering. The panel provides flame charts and timeline views to pinpoint slow components or expensive operations.

These enhancements bring React Native debugging closer to the experience developers enjoy on the web, without requiring additional third-party tools.

Intersection Observer and Web Performance APIs

React Native 0.83 extends its support for standard web APIs. The Intersection Observer API is available as a Canary feature, allowing developers to asynchronously observe changes in the visibility of elements. This is especially useful for implementing lazy loading of images, infinite scroll, or analytics based on viewport exposure.

Meanwhile, the Web Performance APIs (such as PerformanceObserver and related interfaces) are now marked as stable. This means you can reliably measure and monitor your app’s performance using the same APIs you would in a browser, making it easier to transfer knowledge between web and mobile projects.

Security Advisory Regarding CVE-2025-55182

At the time of release, React Native 0.83.0 depends on react@19.2.0. A critical security vulnerability (CVE-2025-55182) was disclosed involving React Server Components. React Native is not directly affected because it does not use the impacted packages (react-server-dom-webpack, react-server-dom-parcel, react-server-dom-turbopack). However, if your project is a monorepo that includes those packages, you should upgrade them immediately. A patch release (0.83.1) will update all React dependencies to 19.2.1 to further mitigate any risks.

Summary

React Native 0.83 is a significant step forward, combining the new React 19.2 features (<Activity> and useEffectEvent) with improved developer tooling and modern web APIs—all without breaking existing code. The addition of Network and Performance panels in DevTools, alongside the Intersection Observer and stable Web Performance APIs, makes this release a must-upgrade for teams building high-quality mobile applications.