Answers for "css change height of div"

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! */

set height to width css

example {
  height: 100px;
  width: 100px;
  background-color: blue;
}

how to get the height of a div in css

var clientHeight = document.getElementById('exampleElement').clientHeight;
alert(clientHeight);

var offsetHeight = document.getElementById('exampleElement').offsetHeight;
alert(offsetHeight)