Try it Editor: Margin collapse

Edit This Code :


<!DOCTYPE html>
<html>
<head>
<style>
h1 {
    margin: 0 0 30px 0;
}

p {
    margin: 20px 0 0 0;
}
</style>
</head>
<body>

<h1>Heading 1</h1>
<p>A paragraph.</p>

</body>
</html>

Result :