html/css center element on page code example

Example 1: css align center

//HTML
<div class="parent">
	<span>Hello World</span>
</div>

//CSS
.parent {
  display: flex;
  justify-content: center;
  align-items: center;
}

Example 2: how to make a division center css

position:absolute;
top:50%;
left:50%;
transform:translate(-50%,-50%);