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React Native's New Architecture replaces the JSON bridge with direct synchronous native calls. Here's what Fabric, TurboModules, and bridgeless mode actually change, plus a safe migration order.
Step‑by‑step guide to enable TurboModules and Fabric in a React Native project, including gradle and pod configuration, Codegen usage, verification, and rollback.
React Native projects can enable Fabric renderer and TurboModules via configuration, which changes native module loading semantics compared with the legacy Paper renderer and bridge. The framework continues to maintain both code paths, and recent releases have shifted Hermes to default while New Architecture remains opt-in. This creates a compatibility bound
When starting a new project with React Native 0.72, the generated templates still use the legacy architecture even though the New Architecture (Fabric) can be enabled via newArchEnabled=true in Gradle and the corresponding CocoaPods flag. The React Native team has documented the opt‑in process, but has not yet decided when—or if—the default should flip to Fa
Migration decision at upgrade time React Native 0.76 enables the New Architecture by default with a documented opt-out via newArchEnabled=false . The legacy architecture is deprecated and slated for removal, so staying on it only delays the inevitable. However, the interop layer that bridges legacy native modules under Fabric has partial, version-dependent c
In React Native versions that support the New Architecture, the transition from the legacy JSON bridge to JSI changes how JavaScript communicates with native code. Fabric enables synchronous rendering, while TurboModules allow lazy loading of native modules. Teams activating this via the newArchEnabled flag in android/gradle.properties face a compatibility b
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