Popout menu

CSS, Interactivity · Dec 30, 2020

Reveals an interactive popout menu on hover/focus.

Use left: 100% to move the popout menu to the right of the parent.
Use visibility: hidden to hide the popout menu initially, allowing for transitions to be applied (unlike display: none).
Use the :hover, :focus and :focus-within pseudo-class selectors to apply visibility: visible to the popout menu, displaying it when the parent element is hovered/focused.

Preview

<div class="reference" tabindex="0">
  <div class="popout-menu">Popout menu</div>
</div>

.reference {
  position: relative;
  background: tomato;
  width: 100px;
  height: 80px;
}

.popout-menu {
  position: absolute;
  visibility: hidden;
  left: 100%;
  background: #9C27B0;
  color: white;
  padding: 16px;
}

.reference:hover > .popout-menu,
.reference:focus > .popout-menu,
.reference:focus-within > .popout-menu {
  visibility: visible;
}