css use entire height code example
Example 1: how to set a div size to full screen
height: 100vh
Example 2: css set div heigtto screen
.left {
height: 100vh;
width: 50%;
background-color: grey;
float: left;
}
.right {
height: 100vh;
width: 50%;
background-color: red;
float: right;
}