set div size code example

Example 1: how to set a div size to full screen

height: 100vh

Example 2: css window height

div {
    height: 100vh;
}

Example 3: css size

#myID {
  height: 100px; /* Sets the height */
  width: 200px; /* Sets the width */
}
/* or... */
.myClass {
  height: 220px; /* Sets the height */
  width: 40px; /* Sets the width */
}
/* They both work! */