rule-r90--role-with-implied-hidden-content-has-keyboard-focus--button-element-within-a-button-element.html

<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>R90 - button</title>
<style>

</style>

</head>

<body>
<main>



<h1 id="id_h1">Button example - HTML parse failure</h1>


<button>
outer button
<button>
inner button
</button>
</button>

</main>

</body>

</html>