CODEWITHSUNDEEP
react-nativeexposdk
Ali Sherazi
Ali Sherazi

Reputation: 21

After updating to expo SDK 51 I got an error of cannot read propery 'style' of undefined

Previously, my project was running on Expo SDK 49. Today, I updated it to SDK 51. However, upon running the expo project with the command npx expo start, I encountered the following errors: Android Bundled 11242ms D:\Projects\Booking\node_modules\expo\AppEntry.js (1661 modules) ERROR TypeError: Cannot read property 'style' of undefined, js engine: hermes ERROR Invariant Violation: "main" has not been registered. This can happen if:

I'm attempting to run the app so I can proceed with my work, but I keep encountering these errors, and none of the solutions seem to be effective.

Upvotes: 2

Views: 3252

Answers (2)

Adriaan Balt
Adriaan Balt

Reputation: 81

Currently upgrading from SDK49 to SDK51 requires a major change in how the app is bundling your code and displaying it. Previously Expo used Webpack but now instead is using Expo Router. The traditional "expo/webpack-config.js" has been deprecated as of SDK51 so you no longer use "main": "node_modules/expo/AppEntry.js" in package.json and instead it needs to be "main": "expo-router/entry" as well as a whole lot of other changes. You can read more about Expo Router here: https://docs.expo.dev/router/introduction/

Here is documentation on how to migrate: https://docs.expo.dev/router/migrate/from-expo-webpack

Note that this error ERROR in ./node_modules/expo-modules-core/build/uuid/uuid.web.js:9:8 Module not found: Can't resolve 'crypto' is happening when running npx expo start in SDK51.

(more details here: https://github.com/expo/expo/issues/26706#issuecomment-1911213867)

Therefore I do not suggest upgrading to SDK51 yet. However it is good to note that the way Expo Router navigation works is vastly different from @react-navigation. More details for that can be found in the above links.

Upvotes: 0

Kouma Ibrahim
Kouma Ibrahim

Reputation: 119

I'm not sure how you upgrade but basically expo suggest that when upgrading,upgrade one Sdk at the time . expo doc:"We recommend upgrading SDK versions incrementally, one at a time. Doing so will help you pinpoint breakages and issues that arise during the upgrade process."

https://docs.expo.dev/workflow/upgrading-expo-sdk-walkthrough/

Upvotes: 0

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