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chore: add Troubleshooting section to React Native docs #10723

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Apr 5, 2023
Merged

chore: add Troubleshooting section to React Native docs #10723

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5ebcf73
chore: add Troubleshooting section to React Native docs
alessbell Apr 4, 2023
f602e4a
move explanation into separate paragraph
alessbell Apr 5, 2023
292016b
fix typo
alessbell Apr 5, 2023
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18 changes: 18 additions & 0 deletions docs/source/integrations/react-native.md
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Expand Up @@ -43,3 +43,21 @@ For more information on setting up Apollo Client, see [Getting started](../get-s
1. Install React Native Debugger and open it.
2. Enable "Debug JS Remotely" in your app.
3. If you don't see the Developer Tools panel or the Apollo tab is missing from it, toggle the Developer Tools by right-clicking anywhere and selecting **Toggle Developer Tools**.

## Troubleshooting

Here are a few common React Native problems and solutions.
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Borrowed this Troubleshooting format from the apollo-link-rest page. Checking to see if there are any other points to call out here from past RN-related issues, but if there's only one I'll remove this line.


* `Uncaught Error: Cannot read property 'prototype' of undefined`, or similar Metro build error -- This is due to the way [the Metro bundler supports `.cjs` and `.mjs` files](https://github.com/facebook/metro/issues/535#issuecomment-1198071838): it requires additional configuration to _implicitly_ resolve files with these extensions, so `import { ApolloClient, InMemoryCache } from '@apollo/client` will result in an error. You can amend your import statement to e.g. `import { ApolloClient, InMemoryCache } from '@apollo/client/main.cjs';`, or you can install `@expo/metro-config` and configure their implicit resolution via `metro.config.js` in the root of your project:
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```js
const { getDefaultConfig } = require('@expo/metro-config');

const config = getDefaultConfig(__dirname);

config.resolver.sourceExts.push(
'cjs'
);

module.exports = config;
```