Built-in APIs

Pun provides several built-in APIs for common tasks.

Pun.serve()

Create a high-performance HTTP server.

Pun.serve({
  port: 3000,
  fetch(req: Request) {
    return new Response("Hello, Pun!");
  }
});

ServerConfig

• port: number: The port to listen on.
• fetch: (req: Request) => Response | Promise<Response>: The handler function for incoming requests.

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Pun.file()

Access files for reading.

const file = Pun.file("data.json");
const data = await file.json();

Methods

• text(): Promise<string>: Read file as text.
• json(): Promise<any>: Read file as JSON.
• arrayBuffer(): Promise<ArrayBuffer>: Read file as an ArrayBuffer.

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Pun.write()

Write data to files.

await Pun.write("output.txt", "Hello, Pun!");
await Pun.write("data.json", { key: "value" });

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Web Standard APIs

Pun supports many standard Web APIs out of the box:

• fetch()
• Request, Response, Headers
• URL, URLSearchParams
• TextEncoder, TextDecoder
• AbortController
• ReadableStream, WritableStream

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Node.js Compatibility

Pun provides partial compatibility with Node.js APIs:

• process: process.env, process.argv, process.cwd(), process.exit(), etc.
• Buffer: Binary data handling.