@testing-library/dom in Deno 2

[gnietto]

I want to use @testing-library/dom along with Deno 2 for testing web apps.
When I use screen for composing assertions, Deno shows me an error because there's no global document.body available.
AFAIK, there's no window API in Deno 2, so there's not document (window.document I suppose).

The question is: how can I get document.body, so I can use @testing-library/dom?

[marvinhagemeister]

Quoting the testing-library/dom documentation on how to do so:

1. Install a package that adds those globals from the browser. You can do so by running

deno install npm:jsdom npm:global-jsdom

2. Import the polyfill in your test files:

import 'global-jsdom/register'

[gnietto]

That advice resolved my question in practice.
I've thinking that happy-dom would work in a similar manner importing happy-dom and @happy-dom/global-registrator.

Now I have a problem trying unsuccessfully to use jest-dom matchers because it doesn't appear to be available. I'm using @std/expect and I'm trying to extend the matchers in it following the instructions in jest-dom documentation.

If I find a satisfactory answer to the second issue, I will post here. So I'll keep this discussion open for now.

[marvinhagemeister]

The happy-dom library should work equally well as jsdom. Traditionally jsdom has been more spec compliant, but for testing standard dom modifications either library works.