<div></div>
<div>
  <h1>titre</h1>
  <p>Lorem ipsum dolor sit amet</p> 
</div>


div:empty{
  width: 200px;
  height: 50px;
  border: thin red solid;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.