wp8-ie10-fix.css

@-ms-viewport{
  width: device-width;
}

wp8-ie10-fix.html

<meta name="viewport" content="width=device-width, initial-scale=1" />

wp8-ie10-fix.js

(function() {
	if ("-ms-user-select" in document.documentElement.style && navigator.userAgent.match(/IEMobile\/10\.0/)) {
		var msViewportStyle = document.createElement("style");
		msViewportStyle.appendChild(
			document.createTextNode("@-ms-viewport{width:auto!important}")
		);
		document.getElementsByTagName("head")[0].appendChild(msViewportStyle);
	}
})();