How to wait for requests and validate responses using playwright?

This is my first time using playwright and I can't figure out how to wait for requests and validate responses. I've been using cypress for a quite a long time, and it was pretty easy to manage network requests. For example, I need to validate response after clicking a button and this is how I would do it with cypress:

        cy.server()
        cy.route('POST', '/api/contacts').as('newContact')

        cy.get('.btn').click()

        cy.wait('@newContact').then((response) => {
            expect(response.status).to.eq(400)
            expect(response.responseBody.data.name).to.eq('abcde')
        })

And this is how I'm trying to do the same thing with playwright, but it validates GET request that was sent long before it even clicked save button. I can't figure out how to manage this request properly and that's a show stopper for my test suite:

        await contacts.clickSaveBtn()

        await page.waitForResponse((resp) => {
            resp.url().includes('/api/contacts')
            expect(resp.status()).toBe(400)
        })

Any help or advice would be really appreciated

What you need to do is first start waiting for the response and then click, so the waitForResponse() can catch the actual response coming as a result of the click.

await Promise.all([
    page.waitForResponse(resp => resp.url().includes('/api/contacts') && resp.status() === 400),
    contacts.clickSaveBtn()
]);

This should handle the possible race condition.