# Bun Install TypeScript declarations for Bun

> Install TypeScript declarations for Bun

- Skill: `jarle/bun-install-typescript-declarations-for-bun` (Agent Skill)
- Install (CLI): `npx skillmds@latest add jarle/bun-install-typescript-declarations-for-bun`
- Raw SKILL.md: https://api.skillmd.com/api/skills/jarle/bun-install-typescript-declarations-for-bun/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: jarle (https://skillmd.com/u/jarle)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/jarle/bun-install-typescript-declarations-for-bun

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# Install TypeScript declarations for Bun

To install TypeScript definitions for Bun's built-in APIs in your project, install `@types/bun`.

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

***

Below is the full set of recommended `compilerOptions` for a Bun project. With this `tsconfig.json`, you can use top-level await, extensioned or extensionless imports, and JSX.

```json 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,

    // 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
  }
}
```

***

Refer to [Ecosystem > TypeScript](/runtime/typescript) for a complete guide to TypeScript support in Bun.