Dom changes after the click + sleep/wait/timeout

[Devloger]

Having something like that

$elem = $page->dom()->querySelectorAll('.user-card__action');
foreach($elem as $e)
{
	$e->click();
	$content = $page->evaluate( 'document.documentElement.innerHTML' )->getReturnValue();
	var_dump(strpos($content, 'Hello there!'));
	//$elem2 = $page->dom()->querySelector('.messenger-ovl__close.im-close');
	//var_dump($elem2);
	//$elem2->click();
	sleep(1);
}

die;

It doesnt work, $elem2 evaluates to null.
I think because the first click $e->click(); changes the DOM. Hello there! is always absent since it can be seen only sometimes after the click $e->click();.
And the $elem2 is always null because the '.messenger-ovl__close.im-close' appears always but only after the first click. So it is not present in the beginning in the DOM. its a close button that appears after first click of any card.

three questions.
1.So the first click changes the DOM. How to update it/reload it/...? So I can find the '.messenger-ovl__close.im-close' and click it after the first click that wasnt present before the first click?
2.Am I doing some waiting right? With sleep(1);? I want the browser and the code to wait at least 1-2s after the clicking, if its too fast it doesnt work. Or is there better/proper way?
3.How to get the actual html after the first click? Cuz sometimes Hello there! is present but only after the first click $e->click(); and it seems like $content = $page->evaluate( 'document.documentElement.innerHTML' )->getReturnValue(); returns the innerHTML before the first click happens.

[enricodias]

If you call Page::dom() again, the previous node ids will become stale. See my last reply in #469. I'll leave this one closed since it's the same issue. Normally I would close the newer issue as a duplicate, but in this case it has more replies and more useful info.

For waiting, you can use Utils::tryWithTimeout() to perform any check every N microseconds. The Page::waitUntilContainsElement() uses this to wait until a desired element appear in the page.