CLI

leserve also ships as a CLI for serving a module’s export directly, without writing a serve() call yourself.

Install

npm install -g @johnhenry/leserve

Usage

leserve <path-to-file> [options]

Or without a global install:

npx @johnhenry/leserve <path-to-file> [options]

Options

• -p, --port <port> — port number (default: 8000)
• -e, --export <name> — export name to use (default: 'default')
• --echo — enable echo mode

Default behavior

By default, leserve serves the default export from the specified file at localhost:8000.

myHandler.mjs

export default (request) => {
  return new Response("Default Handler", {
    headers: { "content-type": "text/plain" },
  });
};

leserve myHandler.mjs

This serves the default export from myHandler.mjs at localhost:8000.

Port flag

leserve myHandler.mjs -p 8001

Serves the default export from myHandler.mjs at localhost:8001.

Export flag

myHandlers.mjs

export const handler = (request) => {
  return new Response("Named Handler", {
    headers: { "content-type": "text/plain" },
  });
};

leserve myHandlers.mjs -p 8080 -e handler

Serves the export named handler from myHandlers.mjs at localhost:8080.

Echo mode

leserve --echo

Responds as an echo server: echoes back each request as a response in JSON format, on port 8000 by default.