// file.cjs
async function* foo() {
  yield await Promise.resolve('a');
  yield await Promise.resolve('b');
  yield await Promise.resolve('c'); // remove this yield to see error in sim/emu
};
function bar() {}; // remove this fn to see error in sim/emu

// Try this example wrapped in a new Function(String.raw``)() to see error

// Hot reload any change to see error in Metro
// [Error: Exception in HostFunction: Compiling JS failed: 2:3:async generators are unsupported Buffer size 665 starts with: 5f5f642866756e6374696f6e2028676c]

// babel.config.js
module.exports = {
  ignore: [/file\.cjs/],
  presets: ['module:metro-react-native-babel-preset'],
};

// e.g. index.js, App.tsx, node_modules/react-native/Libraries/Core/InitializeCore.js
require('./file.cjs');