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<html>
<head>
<meta http-equiv="Content-Security-Policy" content="script-src 'self' 'nonce-allowPDF'; base-uri 'self'">
</head>
<body>
<iframe id="pdfFrame"></iframe>
<br/>
<button id="pdfButton">click to load pdf</button>
<script nonce="allowPDF">
async function loadPDFIntoIframe() {
let response = await fetch("dummy.pdf");
let blob = await response.blob();
var blobUrl = URL.createObjectURL(blob);
var pdfFrame = document.getElementById("pdfFrame");
pdfFrame.src = blobUrl;
}
let pdfButton = document.getElementById("pdfButton");
pdfButton.addEventListener("click", loadPDFIntoIframe);
</script>
</body>
</html>