An early look at Expo Modules 2.0 — Expo blog

Expo Modules 2.0 replaces the 1.0 DSL (built on Swift result builders) with plain annotated Swift and Kotlin classes: a module becomes a class with @JS-marked methods and properties, no definition() function or Name(...) boilerplate. Records, shared objects, and events follow the same pattern using @Record, @SharedObject, and @Event macros. The core macros already ship in SDK 57 for iOS (experimental, undocumented), with an official beta landing in SDK 58 alongside Android support. Because the @JS macro reads Swift function signatures at build time instead of relying on runtime reflection, synchronous calls are 2.5 to 5.6x faster than the 1.0 API on the same SDK; SDK 56's removal of the Objective-C++ layer already made calls 1.5-2x faster than SDK 55. An expo-migrate-module coding-agent skill can automatically convert existing modules from 1.0 to 2.0 incrementally, and generated TypeScript declarations from native code are planned next.

Source: https://expo.dev/blog/an-early-look-at-expo-modules-2-0. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.