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<html>
<head>
<title>3rd party content!</title>
</head>
<body>
<h1>Here the 3rd party content!</h1>
<script>
onmessage = async function(e) {
let cb = e.data.cb;
let runnableStr = `(() => {return (${cb});})();`;
let runnable = eval(runnableStr); // eslint-disable-line no-eval
let variant = (new URL(location.href)).searchParams.get("variant");
let win = this;
if (variant == "initial-aboutblank") {
let i = win.document.createElement("iframe");
i.src = "about:blank";
win.document.body.appendChild(i);
// override win to make it point to the initial about:blank window
win = i.contentWindow;
}
let result = await runnable.call(this, win, e.data.value);
parent.postMessage(result, "*");
};
</script>
</body>
</html>
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