Alexey

$template_id = 2; //id шаблона ресурса
$tv_id = 5; //id tv-поля

$q = $modx->newQuery('modTemplateVarTemplate');
$q->where([
    'tmplvarid' => $tv_id,
    'templateid' => $template_id
]);
$q->limit(1);

return $modx->getCount('modTemplateVarTemplate', $q);

<?php
$eventName = $modx->event->name;
switch($eventName) {
    case 'OnBeforeDocFormSave':
        //$resource = $modx->getObject('modResource', $id);
        $resourceAlias = $resource->get('alias');
        $resourceParent = $modx->getObject('modResource', $resource->get('parent'));
        if ($resourceParent) {
            $resourceParentAlias = $resourceParent->get('alias');
            
            $resourceParentIsTabsContainer = $resourceParent->getTVValue('resourceTabsContainer');
            
            if ($resourceParentIsTabsContainer) {
                $resource->set('uri_override', true);
                $resource->set('uri', $resourceParentAlias.'#'.$resourceAlias);
                
                //$resource->save();
            }
        }
        break;
}

[[AjaxSnippet?
      &snippet=`my_slider`
      &as_mode=`onload`
]]

<div class="slider single-item">
    <div>1</div>
    <div>2</div>
    <div>3</div>
    <div>4</div>
    <div>5</div>
    <div>6</div>
</div>

<script src="//code.jquery.com/jquery-1.11.0.min.js"></script>
<script src="//code.jquery.com/jquery-migrate-1.2.1.min.js"></script>
<link rel="stylesheet" type="text/css" href="vendor/js/slick-theme.css"/>
<link rel="stylesheet" type="text/css" href="vendor/js/slick.css"/>
<script src="vendor/js/slick.js"></script>

<script>
    $(document).on('as_complete', document, function(e,d) {
    	$('.single-item').slick();
    });
</script>