<% if (card.attachments.length > 0 || card.activities.length > 0 || card.labels.length > 0 || card.checklists.length > 0 || card.users.length > 0) { %>

Keep...

<% if (card.attachments.length > 0) {%>
<% } var comment = card.list.collection.board.activities.where({card_id: card.attributes.id, type: "add_comment"}); if (comment.length > 0) { %>
<% } if (card.labels.length > 0) { %>
<%} if (card.checklists.length > 0) { %>
<% } if (card.users.length > 0) { %>
<% } %>
<% } var content_board = '
'; var content_position = '
'; content_list += '
'; content_position += ''; var content = content_board + content_list + content_position; %> <%= content %>