How can Response not set cookies in responses?

[zwhitchcox]

From the docs:

the HttpResponse class enables certain features, like mocking response cookies, which are not available when using the standard Response class

I'm confused about how you supposedly can't add cookies to a response.

new Response('hello world', {
  headers: {
    'Set-Cookie': 'x=1'
  }
})

Or is this just talking about in the browser?

[kettanaito]

Hi, @zwhitchcox. That comment references the forbidden cookie names as per the Fetch API spec, which includes the Set-Cookie. That limitation applies everywhere you have a faithful Fetch API implementation. Server-side implementations ignore certain aspects of the spec so you can set the cookie header in Node.js.

MSW provides a universal HttpResponse class that allows for the Set-Cookie header anywhere.