Typescript Inline Scripts

TypeScript Inline Scripts with Bun

IMPORTANT

• ALWAYS assume Bun runtime with modern TypeScript features
• Imported npm packages will be automatically installed by Bun
• ALWAYS prefer Bun APIs where possible

Example

bun run --install=fallback - < <(cat <<'EOF'
import { z } from 'zod'

console.log(z.coerce.number().parse('5'))
EOF
)

Bun APIs Reference

Core Runtime APIs

• Bun.spawn() - Process spawning and management
• Bun.file() - File system operations and reading
• Bun.write() - File writing operations
• fetch() - HTTP requests (Web API standard)
• Bun.preconnect() - URL preconnection for performance

File System

• Bun.file(path) - Create file handle for reading/writing
• await Bun.file(path).text() - Read file as text
• await Bun.file(path).json() - Read file as JSON
• await Bun.file(path).arrayBuffer() - Read file as ArrayBuffer
• await Bun.write(path, data) - Write data to file

Shell Commands

import { $ } from 'bun'
await $`command` // Execute shell commands with template literals
const result = await $`ls -la` // Capture command output

Compression

• Bun.gzipSync() - Synchronous gzip compression
• Bun.gunzipSync() - Synchronous gzip decompression
• Bun.inflateSync() - Synchronous deflate decompression

SQLite

import { Database } from 'bun:sqlite'
// Database operations and SQL execution

FFI (Foreign Function Interface)

import { dlopen, CString } from 'bun:ffi'
// Native library interaction

Utilities

• Bun.escapeHTML() - HTML escaping
• Bun.hash() - Hashing functions
• Bun.password.hash() - Password hashing
• Bun.password.verify() - Password verification

Node.js Compatibility

• Full Node.js API support via node: imports
• import { createRequire } from 'node:module'
• All standard Node.js modules available

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