Window.open () returns null in IE11 on open
In IE on Windows 10 with default settings, if I run window.open()
against an external internet site from a page on my local computer or on a server on my local network, I get null
.
See my story below. This does not happen in IE on Windows 7 or Google Chrome.
Interestingly, if I enable "Enable Protected Mode" for the intranet zone (so that Protected Mode is the same in the intranet zone and the Internet zone), the problem goes away. However, I need this to work without requiring users to do so.
I have not found clear Microsoft documentation that explains this behavior. I raised a question about this on the EdgeHTML issues site, but wanted to see if the SO community knows why this is happening.
Thank!
<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<script>
var popupWindow = null;
function openWindow() {
popupWindow = window.open('http://microsoft.com', '_blank', 'left=100;top=100;height=100;width=100');
}
function checkWindowStatus() {
if (popupWindow) {
document.getElementById('status').innerHTML += '- Truthy reference. Closed? ' + popupWindow.closed + '</br>';
} else {
document.getElementById('status').innerHTML += '- Falsy reference: ' + popupWindow + '</br>';
}
}
</script>
</head>
<body>
<h2>Popup Issue</h2>
<button onclick="openWindow()">Open Window</button>
<button onclick="checkWindowStatus()">Check Window Status</button>
<button onclick="popupWindow.close()">Close Window</button>
<p id="status"></p>
</body>
</html>
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Protected mode seems to prevent a new window from opening outside the current domain, so you can try opening a window with a blank page after updating the location.
<script>
var popupWindow = null;
function openWindow() {
popupWindow = window.open('', '_blank', 'left=100;top=100;height=100;width=100');
popupWindow.location = 'http://microsoft.com';
}
function checkWindowStatus() {
if (popupWindow) {
document.getElementById('status').innerHTML += '- Truthy reference. Closed? ' + popupWindow.closed + '</br>';
} else {
document.getElementById('status').innerHTML += '- Falsy reference: ' + popupWindow + '</br>';
}
}
</script>
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