The quickest centering?

Okay, how many times have you tried to find the easiest way to center a child element within its parent? We have multiple methods for achieving this, including margins, flexbox, text alignment, vertical align, tables, and so on. But have you ever tried CSS grid? It is a one-liner worth trying.

.parent {
  display: grid;
  place-items: center;

You simply create a grid with one cell and center your child element(s) in it. Done!