22 lines
438 B
HTML
22 lines
438 B
HTML
<!DOCTYPE HTML>
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<body>
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<script>
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function syncXHR() {
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let xhr = new XMLHttpRequest();
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xhr.open("GET", window.location, false);
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xhr.send(null);
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}
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addEventListener('load', evt => {
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syncXHR();
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document.open();
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document.write(
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'<body>' +
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'<iframe src="about:blank"></iframe>' +
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'<script>window.opener.postMessage("DONE", "*");</' + 'script>' +
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'</body>');
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document.close();
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}, { once: true });
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</script>
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</body>
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