React Native Expo Can't Find Variable Self

Question

I am suddenly getting this error while creating the new project in expo, when I create any project it loads perfectly and can see the default screen.

When I try to inst

Answer 1

For users creating new project with expo-cli or XDE, you will get red screen “Can’t Find Variable Self” after your first “yarn” or “npm install”. This is because of new “whatwg-fetch” 3.0.0 published yesterday (https://www.npmjs.com/package/whatwg-fetch 23). So you just need to force dependency to previous version: "whatwg-fetch": "^2.0.4" It means put it in package.json as “dependency”. Manually, with “yarn add whatwg-fetch@2.0.4.” Or with “npm add whatwg-fetch@2.0.4”.

Everything should now work like a charm.

Hope this helps ;p

Links:

• Can't find variable : Self / Can't install firebase

• https://forums.expo.io/t/cant-find-variable-self/13547

Up: expo@30.0.1 added whatwg-fetch@2.0.4 as dependency. Problem is gone ;)