Try it Editor: html5_browsers

Edit This Code :


<!DOCTYPE html>
<html>
<head>
<script>document.createElement("myHero")</script>
<style>
myHero {
    display: block;
    background-color: #dddddd;
    padding: 50px;
    font-size: 30px;
}  
</style>
</head>
<body>

<h1>A Heading</h1>
<myHero>My Hero Element</myHero>

</body>
</html>

Result :

html5_browsers_myhero