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Element type is invalid

See original GitHub issue

What’s happening?

Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it’s defined in, or you might have mixed up default and named imports. Check the render method of QRCodeScanner.

How can it be reproduced?

Build details?

“prop-types”: “^15.6.1”, “react”: “16.3.1”, “react-native”: “0.55.3”, “react-native-camera”: “^0.5.1”, “react-native-qrcode-scanner”: “^1.0.1”

windows 8

Issue Analytics

State:
Created 5 years ago
Comments:5 (1 by maintainers)

Top GitHub Comments

1reaction

fallerdcommented, Sep 18, 2018

I was able to find this page which described a few solutions: https://github.com/facebook/react-native/issues/16332

I was able to solve this by changing this line: class ScanScreen extends Component { to this: export default class ScanScreen extends Component {

0reactions

matejhocevarcommented, Aug 28, 2018

I’ve same error:

"react": "16.4.1",
"react-native": "0.56.0",
"react-native-camera": "^1.2.0",
"react-native-qrcode-scanner": "^1.0.1"

Link to my repository for reproduce: https://github.com/matoxxx/react-native-qrcode-scanner-error

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