element in html

##

# it assumes a ./content.html is present on same dir
#!/usr/bin/env perl

use strict;
use warnings;

use WWW::Mechanize::Chrome;
use Log::Log4perl qw(:easy);
use FindBin;
Log::Log4perl->easy_init($ERROR);

my %mech_params = (
	headless => 0,
	launch_arg => [
		'--window-size=600x800',
		'--password-store=basic', # do not ask me for stupid chrome account password
#		'--remote-debugging-port=9223',
#		'--enable-logging', # see also log above
		'--disable-gpu',
		'--no-sandbox',
		'--ignore-certificate-errors',
		'--disable-background-networking',
		'--disable-client-side-phishing-detection',
		'--disable-component-update',
		'--disable-hang-monitor',
		'--disable-save-password-bubble',
		'--disable-default-apps',
		'--disable-infobars',
		'--disable-popup-blocking',
	],
);
my $mech = WWW::Mechanize::Chrome->new(%mech_params);
$mech->get('file://'.$FindBin::Bin.'/content.html');
my $elem;
$elem = eval { $mech->xpath('//div[@id="id1"]', single=>1) };
die "non-dynamic element not found" unless defined $elem;
$mech->sleep(2);
my $ret = eval { $mech->wait_until_visible(
	  xpath=>'//div[@id="id2"]',
	  timeout=>2, # it's already there after 1.5s
	); 1;
};
die "dynamic element not found"
  unless defined($ret) && ($ret==1) && ! $@;
print "OK dynamic element found!\n";

##

##

document.evaluate('//div[@id="abc"]', null, document.body, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null).snapshotLength;