Why is is top:50% in css not working?

Question

I am making a website and I\'m trying to vertically center:

 position: absolute;
 width:1200px;
 height:600px;
 top: 50%;
 left: 50%;
 margin-left: -600px;
         


        

Answer 1

You can use

calc(%50 - (items_height/2));

to center.