Vertically centers an element in another.

<div class="ghost-trick">
  <div class="ghosting"><p>Vertically centered without changing the position property.</p></div>
</div>

.ghosting {
  height: 300px;
  background: #0ff;
}

.ghosting:before {
  content: '';
  display: inline-block;
  height: 100%;
  vertical-align: middle;
}

p {
  display: inline-block;
  vertical-align: middle;
}

Explanation

• Use the style of a :before pseudo-element to vertically align inline elements without changing their position property.

Browser support

• https://caniuse.com/#feat=inline-block