flex box css tricke code example

Example 1: flex css end

.item {
  align-self:flex-start | flex-end | center | baseline | stretch;
}

Example 2: whats the best ways to 3 x 3 perfects squares on a webpage using flexbox

.parent {
  display: flex;
  height: 300px; /* Or whatever */
}

.child {
  width: 100px;  /* Or whatever */
  height: 100px; /* Or whatever */
  margin: auto;  /* Magic! */
}