<p></p>
<p>w3tr</p>p:empty {
width:100px;
height:100px;
background: blue;
}
External CSS
This Pen doesn't use any external CSS resources.
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This Pen doesn't use any external JavaScript resources.
<p></p>
<p>w3tr</p>p:empty {
width:100px;
height:100px;
background: blue;
}This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.