react native app - getting error app.js cannot read property 'filename' of undefined

Question

well i am not getting any answers to this error .. npm update to latest and downgrade also tried. nothing works package.json so it i get some help ...

{
  "name": "kelsnew",
  "version": "0.1.0",
  "private": true,
  "devDependencies": {
    "jest-expo": "~27.0.0",
    "react-native-scripts": "^1.14.1",
    "react-test-renderer": "16.3.1"
  },
  "main": "./node_modules/react-native-scripts/build/bin/crna-entry.js",
  "scripts": {
    "start": "react-native-scripts start",
    "eject": "react-native-scripts eject",
    "android": "react-native-scripts android",
    "ios": "react-native-scripts ios",
    "test": "jest"
  },
  "dependencies": {
    "expo": "^28.0.0",
    "jest": "^23.4.1",
    "react": "16.3.1",
    "react-native": "^0.56.0"
  }
}

Patrick · Accepted Answer · 2018-11-09 22:43:21Z

3

I tried several things and several things in combination, but ultimately when I added @babel to my .babelrc plugin line without any other changes. I then deleted node_modules, package-lock.json and ran npm install.

{
  "presets": ["babel-preset-expo"],
  "env": {
    "development": {
      "plugins": ["@babel/transform-react-jsx-source"]
    }
  }
}

I also upgraded from Nodejs 8 to 10 along the way (and stayed there). I don't think it material, but I mention it just in case, check your node --version.

answered Nov 9, 2018 at 22:43

Patrick

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Comments

Asleepace · Accepted Answer · 2018-07-26 22:22:51Z

1

Check your app.js for any calls to the property filename such as someObject.filename, this is most likely due to some object not being instantiated and thus you are getting undefined.filename which throws an error.

answered Jul 26, 2018 at 22:22

Asleepace

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2 Comments

Jayana Soneji Over a year ago

well its not that..i try to make another project from scratch and getting errors ..

Asleepace Over a year ago

@JayanaSoneji hmmmm... can you edit your original post to include the app.js file so I can take a look?

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