> ## Documentation Index
> Fetch the complete documentation index at: https://bun.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# TypeScript 6 and 7

> How to configure Bun's type definitions for TypeScript 6.0 and 7.0, which no longer auto-discover @types packages. Fix 'Cannot find name Bun' and other missing type errors after upgrading TypeScript.

TypeScript 6.0 changed how type definitions are discovered. If you've upgraded TypeScript and your editor no longer recognizes `Bun`, `Request`, or other globals from `@types/bun`, here's how to fix it.

## What changed

Starting in TypeScript 6.0, the `types` field in `compilerOptions` defaults to an empty array instead of including all `@types/*` packages. You now need to explicitly list the type packages you use.

## Add `"types": ["bun"]` to your tsconfig

In your `tsconfig.json`, add `"types": ["bun"]` to `compilerOptions`:

```jsonc tsconfig.json icon="file-json" theme={"theme":{"light":"github-light","dark":"dracula"}}
{
  "compilerOptions": {
    "types": ["bun"], // [!code ++]
  },
}
```

This tells TypeScript to load type definitions from `@types/bun`. If you use other `@types/*` packages, include them too:

```jsonc tsconfig.json icon="file-json" theme={"theme":{"light":"github-light","dark":"dracula"}}
{
  "compilerOptions": {
    "types": ["bun", "react"],
  },
}
```

You still need `@types/bun` installed — the `types` option tells TypeScript *which* packages to include, but the package itself must exist in `node_modules`:

```sh terminal icon="terminal" theme={"theme":{"light":"github-light","dark":"dracula"}}
bun add -d @types/bun
```

## Full recommended tsconfig.json

Here's the full recommended `tsconfig.json` for a Bun project using TypeScript 6.0 or later:

```jsonc tsconfig.json icon="file-json" theme={"theme":{"light":"github-light","dark":"dracula"}}
{
  "compilerOptions": {
    // Environment setup & latest features
    "lib": ["ESNext"],
    "target": "ESNext",
    "module": "Preserve",
    "moduleDetection": "force",
    "jsx": "react-jsx",
    "allowJs": true,
    "types": ["bun"],

    // Bundler mode
    "moduleResolution": "bundler",
    "allowImportingTsExtensions": true,
    "verbatimModuleSyntax": true,
    "noEmit": true,

    // Best practices
    "strict": true,
    "skipLibCheck": true,
    "noFallthroughCasesInSwitch": true,
    "noUncheckedIndexedAccess": true,
    "noImplicitOverride": true,

    // Some stricter flags (disabled by default)
    "noUnusedLocals": false,
    "noUnusedParameters": false,
    "noPropertyAccessFromIndexSignature": false,
  },
}
```

## Does this apply to TypeScript 7?

Yes. TypeScript 7 carries forward the same default. If you're upgrading directly from TypeScript 5 to 7, the same fix applies — add `"types": ["bun"]` to your `compilerOptions`.