{"name":"TypeError","message":"Response constructor: Invalid response status code 204"} is thrown when browser is making a OPTIONS preflight request to an Elysia server running on Node.js

[dtinth]

Node.js’s Response constructor throws an error when response body is not null (e.g. empty string):

new Response('', { status: 204 })
/*
Uncaught TypeError: Response constructor: Invalid response status code 204
    at webidl.errors.exception (node:internal/deps/undici/undici:1636:14)
    at initializeResponse (node:internal/deps/undici/undici:5754:31)
    at new Response (node:internal/deps/undici/undici:5548:9)
*/

This is what @elysiajs/cors does:

• https://github.com/elysiajs/elysia-cors/blob/7ce6d9a64ff5df81d9be5b38c512c38b61fdb179/src/index.ts#L265-L267
• https://github.com/elysiajs/elysia-cors/blob/7ce6d9a64ff5df81d9be5b38c512c38b61fdb179/src/index.ts#L281-L283

Solution is to set body to null instead of ''.

Dependency versions

    "@elysiajs/cors": "1.0.0-beta.0",
    "elysia": "1.0.0-beta.1",

[SaltyAom]

c069ff9 set response to null as suggested, published on 1.0.0-beta.1

Let me know if this fix the problem.

[dtinth]

My tests are passing now, thank you!