var userAgent, ieReg, ie;
userAgent = window.navigator.userAgent;
ieReg = /msie|Trident.*rv[ :]*11./gi;
ie = ieReg.test(userAgent);

if(ie) {
$(".carousel-item").each(function () {
var $container = $(this),
imgUrl = $container.find("img").prop("src");
if (imgUrl) {
$container.css({"backgroundImage":'url(' + imgUrl + ')',
"background-size":"cover",
"height":"100vh",
"width":"100vw",
"max-width":"100%",
"background-position":"center"});
}
});
}