use WWW::Mechanize::Chrome;

my $mech = WWW::Mechanize::Chrome->new(   
        headless => 1  
);
my $console = $mech->add_listener('Runtime.consoleAPICalled', sub { 
  warn join ", ",
      map { $_->{value} // $_->{description} }
      @{ $_[0]->{params}->{args} };
});

$mech->get('https://google.com');

# SyntaxError: Illegal return statement at xx line 17.
$mech->eval_in_page('if(1){console.log("aaa"); return;} console.log("bbb");');

# ReferenceError: exit is not defined
$mech->eval_in_page('if(1){console.log("aaa"); exit;} console.log("bbb");');

# Works but is there anything simpler???
$mech->eval_in_page('function xxx(){if(1){console.log("aaa"); return;} console.log("bbb");} xxx();');