The main breaking change in version 3 is that the function signature now uses the W3C standard Request and Response classes directly:

export default (req: Request) => {
  return new Response(`Hello, from Deno v${Deno.version.deno}!`);
};

Please see the migration guide for further details.

Major Changes

• Remove legacy interfaces, implement Vercel style interface: #132
• Remove deprecated syntax from dev server: 554900ebd1de9f048aac05c8f9e2d552773f99d8
• Remove shebang flag file path relativization: 2ed36521103ec45e4a15f1f76b60d061c4788223

Minor Changes

• Extract build logic into DenoLambda class: #133

Patches

• Update Deno std used by dev server: #102
• Default to Deno v1.30.3: d3ce5c1a1b025e5842dd6f1b7200e97ec0df8766

Credits

Huge thanks to @katsuki-yuri and @kidonng for helping!