If I want to open a modal & check something, could it simulate clicking on open modal button? Or is it first level for now (without any support for interactions / javascript magic)
Hurl works only on the HTTP layer, there is no JavaScript engine. If your modal open a form that will trigger some kind of XHR, you'll "simulate" the HTTP traquets that the form modal could have done. Hurl is not a kind of Playwright for instance.