Expo SDK 44 upgrade ERROR - App.js: [BABEL]: Unexpected token '.'

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I have recently upgraded my app from SDK 40 to SDK 44 and came across this error App.js: [BABEL]: Unexpected token '.' (While processing: /Users/user/path/to/project/node_modules/babel-preset-expo/index.js)

Error Stack Trace:

App.js: [BABEL]: Unexpected token '.' (While processing: /Users/user/path/to/project/node_modules/babel-preset-expo/index.js)
/Users/user/path/to/project/node_modules/babel-preset-expo/index.js:48
        ...(options?.jsxRuntime !== 'classic' && {
                    ^

SyntaxError: Unexpected token '.'
    at wrapSafe (internal/modules/cjs/loader.js:931:16)
    at Module._compile (internal/modules/cjs/loader.js:979:27)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1035:10)
    at Module.load (internal/modules/cjs/loader.js:879:32)
    at Function.Module._load (internal/modules/cjs/loader.js:724:14)
    at Module.require (internal/modules/cjs/loader.js:903:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at loadCjsDefault (/Users/user/path/to/project/node_modules/@babel/core/lib/config/files/module-types.js:85:18)
    at loadCjsOrMjsDefault (/Users/user/path/to/project/node_modules/@babel/core/lib/config/files/module-types.js:57:16)

Here is my babel.config.js:

return {
    presets: ['babel-preset-expo', { jsxRuntime: 'automatic' }],
    plugins: [
        ['inline-dotenv'],
        ['.....']
    ]
}

Here is my package.json:

{
    "main": "node_modules/expo/AppEntry.js",
    "scripts": {
        "start": "expo start",
        "android": "expo start --android",
        "ios": "expo start --ios",
        "web": "expo start --web",
        "eject": "expo eject",
        "test": "jest"
    },
    "jest": {
        "preset": "jest-expo"
    },
    "dependencies": {
        "@babel/plugin-transform-react-jsx": "^7.16.5",
        "@react-native-async-storage/async-storage": "~1.15.0",
        "@react-native-community/art": "^1.2.0",
        "@react-native-community/datetimepicker": "4.0.0",
        "@react-native-community/masked-view": "0.1.10",
        "@react-native-community/netinfo": "7.1.3",
        "@react-native-community/push-notification-ios": "^1.2.2",
        "@react-native-community/slider": "4.1.12",
        "@react-navigation/native": "^5.1.4",
        "aws-amplify": "^3.3.1",
        "aws-amplify-react-native": "^4.2.6",
        "axios": "^0.19.2",
        "expo": "^44.0.0",
        "expo-app-loading": "~1.3.0",
        "expo-barcode-scanner": "~11.2.0",
        "expo-camera": "~12.1.0",
        "expo-constants": "~13.0.0",
        "expo-font": "~10.0.4",
        "expo-linking": "~3.0.0",
        "expo-mail-composer": "~11.1.0",
        "expo-notifications": "~0.14.0",
        "expo-permissions": "~13.1.0",
        "expo-secure-store": "~11.1.0",
        "expo-sqlite": "~10.1.0",
        "expo-updates": "~0.11.2",
        "expo-web-browser": "~10.1.0",
        "file-saver": "^2.0.2",
        "jsbarcode": "^3.11.3",
        "link": "^0.1.5",
        "metro-config": "^0.64.0",
        "npm": "^8.3.0",
        "qs": "^6.9.4",
        "react": "17.0.1",
        "react-dom": "17.0.1",
        "react-native": "https://github.com/expo/react-native/archive/sdk-44.0.0.tar.gz",
        "react-native-barcode-expo": "^1.1.1",
        "react-native-elements": "^3.2.0",
        "react-native-fs": "^2.16.6",
        "react-native-gesture-handler": "~2.1.0",
        "react-native-modal": "^11.5.6",
        "react-native-modal-datetime-picker": "^8.6.0",
        "react-native-paper": "^3.10.1",
        "react-native-push-notification": "^3.5.2",
        "react-native-reanimated": "~2.3.1",
        "react-native-router-flux": "^4.2.0",
        "react-native-safe-area-context": "3.3.2",
        "react-native-screens": "~3.10.1",
        "react-native-snap-carousel": "^3.9.1",
        "react-native-svg": "12.1.1",
        "react-native-web": "0.17.1",
        "react-navigation-animated-switch": "^0.6.4",
        "react-navigation-drawer": "^2.4.11",
        "react-navigation-header-buttons": "^3.0.5",
        "react-router-dom": "^6.0.0-alpha.3",
        "yarn": "^1.22.17"
    },
    "devDependencies": {
        "@babel/core": "^7.12.9",
        "@babel/runtime": "^7.9.2",
        "@react-native-community/eslint-config": "^0.0.7",
        "babel-jest": "^25.1.0",
        "babel-plugin-inline-dotenv": "^1.6.0",
        "babel-preset-expo": "9.0.1",
        "eslint": "^6.8.0",
        "expo-cli": "^5.0.2",
        "jest": "^26.6.3",
        "jest-expo": "^44.0.0",
        "metro-react-native-babel-preset": "^0.66.2",
        "react-test-renderer": "^16.13.1"
    },
    "private": true
}

Any help will be greatly appreciated.

5 Answers

Just to let you know, it's a bug in babel-preset-expo when you are using Node 12.

Optional chainning is not supported in node12 and can be easily replaced with extra checks

https://github.com/expo/expo/pull/15545

From what I can see, Expo SDK 44 is still in beta.

The Error Stack Trace reads that newer syntax (in this case the optional chaining operator ?.) isn't being transpiled by Babel which causes the failure.

Simply downgrading to the stable SDK 43 should solve all issues.

P.S: This error has been reported to Expo already by the beta testers.

If you use expo v44 you have to update babel-preset-expo dev dependency to v9.0.2:

"babel-preset-expo": "9.0.2",

Downgrading to SDK 43.0.0 worked fine for me:

expo update 43.0.0
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