Card Flip animation in HTML CSS not working in IE - html

Question

This card clip HTML component uses just HTML and CSS, it works except on IE11. On IE11, it is slow and laggy. When I remove backface-visibility:hidden, then it works perfectly on IE11 but I obviously need that line.
What potential fixes are there
https://codepen.io/anon/pen/pKWPVb
<div class="card">
<div class="card__side card__side--front">
</div>
<div class="card__side card__side--back ">
</div>
</div>
CSS
.card {
width: 200px;
perspective: 150rem;
-moz-perspective: 150rem;
position: relative;
height: 52rem;
}
.card__side {
border-radius: 3px;
overflow: hidden;
background: #808080;
height: 50rem;
width: 100%;
transition: all 800ms ease;
position: absolute;
top: 0;
left: 0;
backface-visibility: hidden;
}
.card__side--front {
background: red;
z-index: 1;
}
.card__side--back {
transform: rotateY(180deg);
-ms-transform: rotateY(180deg);
}
.card:hover .card__side--front {
transform: rotateY(-180deg);
-ms-transform: rotateY(-180deg);
}
.card:hover .card__side--back {
transform: rotateY(0deg);
-ms-transform: rotateY(0deg);
}
html {
font-size: 5px;
}

Answer 1

Issue in IE is caused with transition.
If using 2 div elements is not necessary to you, I would suggest something like that:
<div class="card">
<div class="card__side card__side--back ">
</div>
</div>
.card {
width: 200px;
perspective: 150rem;
-moz-perspective: 150rem;
position: relative;
height: 52rem;
}
.card__side {
border-radius: 3px;
overflow: hidden;
background: #808080;
height: 50rem;
width: 100%;
transition: all 800ms ease;
position: absolute;
top: 0;
left: 0;
//backface-visibility: hidden;
}
.card__side--back {
transform: rotateY(180deg);
-ms-transform: rotateY(180deg);
-webkit-transform: rotateY(180deg);
}
.card:hover .card__side--back {
transform: rotateY(0deg);
background: red;
-ms-transform: rotateY(0deg);
-webkit-transform: rotateY(0deg);
}
html {
font-size: 5px;
}