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<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta charset="utf-8">
<style>
@font-face {
font-family: Ahem; src: url(Ahem.ttf);
}
body, html {
width: 100%;
height: 100%;
margin: 0;
font-size: 16px;
font-family: Ahem;
-webkit-text-size-adjust: none;
}
iframe {
width: 200px;
height: 200px;
border: 1px solid black;
}
</style>
<script>
subframeLoaded = false;
addEventListener("message", event => {
if (event.data === "subframeLoaded")
subframeLoaded = true;
});
addEventListener("load", () => {
const subframe = document.querySelector("iframe");
subframe.src = "nested-frames.html";
});
</script>
</head>
<body>
<p>Here's to the crazy ones.</p>
<iframe></iframe>
</body>
</html>
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