Why can't the parser even find the body on the page?

Question

Parsing

Hello. Can you please tell me why the selection by tag may not work in my case? Whatever I choose, I always get an empty object. If I try innerHTML - I get instead of an empty html body object.

function getPage(url, proxy) {
    const nightmare = Nightmare({
        show: true,
        switches: {
            'proxy-server': proxy[Math.floor(Math.random() * proxy.length)],
            'ignore-certificate-errors': false
        },
    });
    return nightmare
        .authentication('888', '8888')
        .goto(url)
        .evaluate(() => {
            return [document.querySelector('ul')];
        })
        .then(data => console.log(data)) // [ {} ]
}

PS:

.evaluate(() => {
            return document.body; // {}
        })

Thank you.

Answer 1

Most likely the site is a SPA based on some react and the house was simply not built at the time of the request.
The documentation has a method .wait()for waiting for the necessary elements to appear.