禁止蒙层底部页面跟随滚动

• html

<div class="wrap">
        <ul id="wrap_item">
        </ul>
    </div>

• css

body {
height:100%
    background-color: #F5F5F5;
}
.wrap {
    height: 100%;
    padding: .2rem;
    background-color: #F5F5F5;
    overflow-y: scroll;
}