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TypeError: Cannot set property 'getFragmentDoc' of undefined

See original GitHub issue

I’m trying out Apollo Client 3 with create-react-app. I’m getting the error below. Not sure what am I doing wrong.

Index.js

Screenshot 2020-07-23 at 4 28 37 PM

App.js

Screenshot 2020-07-23 at 4 28 11 PM

Actual outcome: Screenshot 2020-07-23 at 4 27 30 PM

Versions

System:
    OS: macOS 10.15.6
Binaries:
    Node: 14.5.0 - /usr/local/bin/node
    Yarn: 1.22.4 - /usr/local/bin/yarn
    npm: 6.14.5 - /usr/local/bin/npm
Browsers:
    Chrome: 81.0.4044.138
    Safari: 13.1.2
npmPackages:
    @apollo/client: ^3.0.2 => 3.0.2

Issue Analytics

State:
Created 3 years ago
Comments:5 (1 by maintainers)

Top GitHub Comments

38reactions

theneshofficialcommented, Aug 3, 2020

Can someone tell me what is the reason for this error?

The inmemorycache should be instantiated with “new” keyword.

8reactions

benjamncommented, Aug 3, 2020

Confirming @theneshofficial’s answer (use new InMemoryCache()).

In strict mode, if you call a constructor function without new, this will be undefined. If you’re using native class syntax rather than transpiling, constructor functions will throw an exception if you call them without using new, which helps prevent this problem, but most people are still transpiling class to function to support older browsers.

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