SyntaxError: Unexpected token export when running jest about picker

[christianchownsan]

In case anyone else still experiences problems with the above, I found the secret sauce for me was:

"transformIgnorePatterns": [
  "node_modules/(?!(jest-)?react-native|@react-native-community|@react-native-picker)",
],

[Maker-Mark]

Still seeing this issue, even if using transformIgnorePatterns

[HugoLiconV]

I added this to my package.json

"jest": {
    "transformIgnorePatterns": [
      "node_modules/(?!(react-native|react-native-vector-icons|@react-native-community/picker)/)"
    ],
}

After adding this, you'll get this error: TypeError: Cannot read property 'default' of undefined. To solve it go to node_modules/@react-native-community/picker/js/PickerIOS.ios.js and add a constructor to the PickerIOS component:

class PickerIOS extends React.Component<Props, State> {
  _picker: ?ElementRef<RNCPickerIOSType> = null;
+  constructor(props) {
+    super(props)
+  }
  state = {
    selectedIndex: 0,
    items: [],
  };
// ...

[ebaynaud]

Thanks @HugoLiconV, adding constructor was not required but adding @react-native-community/picker to transformIgnorePatterns helped.

[SebastianMieszczanczyk]

In case anyone else still experiences problems with the above, I found the secret sauce for me was:

"transformIgnorePatterns": [
  "node_modules/(?!(jest-)?react-native|@react-native-community|@react-native-picker)",
],

Make sure you add this under "jest" in package.json or jest config
Works for me. Thanks

[cs-manughian]

To fix the unexpected token error, I updated the config-overrides.js with:

module.exports = override(
    babelInclude([
        ...
        path.resolve('src'),
        path.resolve(__dirname, 'node_modules/@react-native-picker/picker'),
    ]),
);

[sorodrigo]

Just in case it helps. I had the same issue because I was using expo-image-picker my solution was to also ignore expo-modules-core.

[Maker-Mark]

Just in case it helps. I had the same issue because I was using expo-image-picker my solution was to also ignore expo-modules-core.

I was seeing this issue without using expo-image-picker.