请告诉我为什么我不能设置div的刻度?
var a = 0.1;
var b = 0.1;
var scale = a+b;
$(".item").css('scale', scale)
.item {
width: 100px;
height: 100px;
background: blue;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="item"></div>