<!DOCTYPE html>
<html>
<head>
<title>Frame with WebView</title>
<style>
body {
margin: 0;
padding: 0;
}
webview {
position: absolute;
left: 100px;
top: 200px;
width: 200px;
height: 100px;
outline: 1px solid #000;
}
</style>
</head>
<body>
<button>Outer</button>
<webview src="data:text/html,<body style='margin: 0; padding: 0;'><button>Inner</button>"></webview>
</body>
</html>