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@-ms-viewport rule doesn't work in WP8 IE10 #62

stowball opened this Issue Jan 8, 2013 · 1 comment


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stowball commented Jan 8, 2013

I've written a post explaining that it doesn't work here: http://mattstow.com/responsive-design-in-ie10-on-windows-phone-8.html

You need to use this instead:

@media (max-width: 400px) { /* or 25em to be "responsibly responsive" */
    @-ms-viewport {
        width: 320px;

Microsoft have offered a solution to the viewport bug. I've described it here: http://mattstow.com/responsive-design-in-ie10-on-windows-phone-8.html#update-2013015

Basically, they want us to continue using

    width: device-width;

and then using a script immediately after the CSS to modify the viewport for IE 10.0 only

if (navigator.userAgent.match(/IEMobile\/10\.0/)) {
    var msViewportStyle = document.createElement("style");
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