Run Example

Edit This Code:

<!DOCTYPE html>
<html>
<head>
<title> Page Title </title>
<style type="text/css">
#unique {
  background-color: lightblue;
  padding: 50px;
  text-align: center;
}
</style>
</head>
<body>
<h1> This is id attribute example. </h1>
<h1 id="unique"> id attribute </h1>
</body>
</html>

Result: