v3.x bundles react/jsx-runtime into dist, breaking all React Native (Metro) apps in dev mode #75

Summary

Since v3.0.0, dist/index.js contains an inlined copy of react/jsx-runtime instead of importing it. React's dev JSX runtime does require("react") internally, and because the ESM output can't emit a static require, Rolldown compiles it into a dynamic-require shim. Metro cannot statically resolve that, so importing the SDK throws immediately in any development build.

Error

[Error: Requiring unknown module "react". If you are sure the module exists, try restarting Metro. You may also want to run yarn or npm install.]

Reproduction

1. Expo SDK 55 app (RN 0.83.6, React 19.2.0), default Metro config
2. npm i @formbricks/react-native@3.0.1
3. Add import Formbricks from "@formbricks/react-native"; to App.js
4. npx expo start --clear → throws on load, before any SDK call

Affects 3.0.0, 3.0.1 and 3.1.0. 2.4.0 is unaffected.

Root cause

packages/react-native/vite.config.ts lists externals as exact strings:

external: ["react", "react-native", "react-dom", ...]

Rollup/Rolldown match these exactly, so "react" does not cover the react/jsx-runtime subpath that the automatic JSX transform emits. It gets bundled instead of externalized.

In dist/index.js this produces (line ~3312):

var h = m("react"), g = Symbol.for("react.transitional.element"), ...

where m is Rolldown's typeof require < "u" ? require : ... shim. Metro's dependency collector only rewrites literal require("...") calls into numeric module IDs, so this reaches metroRequire("react") with a string at runtime and throws.

This appears to be a regression from the Vite 7 → 8 (esbuild → Rolldown/Oxc) upgrade: 2.4.0 compiled JSX with the classic runtime (React.createElement) and never imported react/jsx-runtime, so the incomplete externals list was harmless. 3.x uses the automatic runtime.

Suggested Fix

Externalize React subpaths in vite.config.ts:

external: [
  /^react($|\/)/,          // covers react/jsx-runtime + react/jsx-dev-runtime
  /^react-native($|\/)/,
  "react-dom",
  "react-native-webview",
  "@react-native-async-storage/async-storage",
  "@react-native-community/netinfo",
],