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<!DOCTYPE html>
<html lang="en-US">
<head>
<title>Media Queries Test inner frame</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="Content-Style-Type" content="text/css">
<style>
html, body {
width: 100%;
height: 100%;
margin: 0;
}
</style>
<style type="text/css" id="style" media="all and (display-mode: browser)">
body { background: yellow; }
</style>
<style type="text/css" id="style" media="all and (display-mode: standalone)">
body { background: green; }
</style>
<style type="text/css" id="style" media="all and (display-mode: minimal-ui)">
body { background: red; }
</style>
<style type="text/css" id="style" media="all and (display-mode: fullscreen)">
body { background: blue; }
</style>
</head>
<body>
<script>
window.addEventListener("message", e => {
if (e.data == "get-background-color") {
let { backgroundColor } = document.defaultView.getComputedStyle(document.body);
e.source.postMessage({ backgroundColor }, e.origin);
}
});
</script>
</body>
</html>