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Add more details to env setup docs (Expo) #259

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Jan 15, 2025
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Add more details to env setup docs (Expo) #259

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18 changes: 16 additions & 2 deletions apps/website/docs/learn/02-environment-setup.md
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,7 @@ function getIsDev(caller) {
}

module.exports = function (api) {
// If not using Expo, set these values manually or by other means
const platform = api.caller(getPlatform);
const dev = api.caller(getIsDev);

Expand Down Expand Up @@ -90,12 +91,25 @@ const projectRoot = __dirname;
const config = getDefaultConfig(projectRoot);
// 1. Enable Metro support for symlinks and package exports
config.resolver.unstable_enablePackageExports = true;
// 2. Force Metro to resolve (sub)dependencies only from the `nodeModulesPaths`
config.resolver.disableHierarchicalLookup = true;
// 2. Only for npm monorepos: force Metro to resolve (sub)dependencies only from the `nodeModulesPaths`
// config.resolver.disableHierarchicalLookup = true;

module.exports = config;
```

TypeScript-based Expo projects should also set `moduleResolution` to `"bundler"`.

```js title="tsconfig.json"
{
"extends": "expo/tsconfig.base",
"compilerOptions": {
"strict": true,
"moduleResolution": "bundler",
},
...
}
```

## App files

Your app needs to include a CSS file that contains a `@stylex` directive. This acts as a placeholder that is replaced by the generated CSS during builds.
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