blob: 9e2851aa8b6105e4f73485af21dca8383faa510d (
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<script type="application/javascript">
"use strict";
addEventListener("message", event => {
if ("ping" in event.data) {
event.source.postMessage({ pong: event.data.ping }, event.origin);
}
});
</script>
</head>
<body>
</body>
</html>
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