Positioning text within a parent div

Submitted by barnettech on Thu, 09/05/2019 - 16:31

For a document that looks like this:

This paragraph…

the style sheet looks like this:

div.container3 {
height: 10em;
position: relative } /* 1 */
div.container3 p {
margin: 0;
position: absolute; /* 2 */
top: 50%; /* 3 */
transform: translate(0, -50%) } /* 4 */
The essential rules are:

Make the container relatively positioned, which declares it to be a container for absolutely positioned elements.
Make the element itself absolutely positioned.
Place it halfway down the container with 'top: 50%'. (Note that 50%' here means 50% of the height of the container.)
Use a translation to move the element up by half its own height. (The '50%' in 'translate(0, -50%)' refers to the height of the element itself.)

https://www.w3.org/Style/Examples/007/center.en.tmpl