make div take full height code example

Example 1: stretch div to full height

#root {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
}

Example 2: how to set a div size to full screen

height: 100vh

Example 3: css window height

div {
    height: 100vh;
}

Example 4: 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;
}