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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.

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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.

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

In your tsconfig.json, add "types": ["bun"] to compilerOptions:
tsconfig.json
{
  "compilerOptions": {
    "types": ["bun"], 
  },
}
This tells TypeScript to load type definitions from @types/bun. If you use other @types/* packages, include them too:
tsconfig.json
{
  "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:
terminal
bun add -d @types/bun
Here’s the full recommended tsconfig.json for a Bun project using TypeScript 6.0 or later:
tsconfig.json
{
  "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,
  },
}

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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.