Using a class name for all the containers you want to toggle

(flex friendly)

CSS

.hidden
{
  display: none;
}

Javascript

const elements = document.querySelectorAll('.MyToggleTarget');

elements.forEach(element =>
{
  element.classList.toggle('hidden');
});

HTML

<div class="MyToggleTarget"></div>
<div class="MyToggleTarget"></div>

//Or you can start off hidden
<div class="MyToggleTarget hidden"></div>