私は現在、会社のウェブサイトを開発しています。ギャラリー セクションでは、管理者は次のようなデザインを望んでいます。

Unfortunately, I don't know how I can do that... I tried searching Google but I didn't found anything.
It would be something like this and when you click on another .item, it close the current opened item and open the new one... the arrow should be below the item, centered with it. Also, when you click on the .item.open <a> link, it close the "pop-below" (similar to a popover but below instead of over...) if it is opened.
I know that my JQuery code will be something like:
$('.item a').click(function(e) {
if ($(this).parent().hasClass('open')) {
$(this).parent().removeClass('open'); // which would slide the details up
} else {
var $id = $(this).data('item-id');
getItemDetail($id);
}
e.preventDefault();
});
Here's a exemple HTML I'll be using:
<div class="container">
<div class="projects">
<div class="item">
<a href="#item" data-item-id="exempleid" class="item-link">
<img src="" alt="item">
</a>
<!-- HERE GOES THE DETAIL-PANE -->
</div>
</div>
</div>
If someone has an idea on how I could do that, I would appreciate it!