Horizontally and vertically centers a child element within a parent element using grid.

• Use display: grid to create a grid layout.
• Use justify-content: center to center the child horizontally.
• Use align-items: center to center the child vertically.

<div class="grid-centering">
  <div class="child">Centered content.</div>
</div>

.grid-centering {
  display: grid;
  justify-content: center;
  align-items: center;
  height: 100px;
}