testing/web-platform/tests/html/semantics/embedded-content/the-iframe-element/support/iframe_sandbox_010.htm


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<!DOCTYPE html>
<html>
<head>
    <title>Page with window.open()</title>
</head>
<body>
    <button type="button" onclick="javascript:window.open('standalone-fail.htm')">Click here to call window.open() API</button>
</body>
</html>