弹出层居中定位的实现
HTML部分
<div class="shadow" v-show="showShadow"> <div class="shadow-main"> <h3>温馨提示</h3> <p>您来晚啦!本商品太过抢手!明天早点来哦~</p> <button class="choise-shadow" @click="off()">确 定</button> </div> </div>
css部分实现方法
.shadow为底部黑色半通明遮罩层
.shadow-main为内容部分
.shadow{
z-index: 99;
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: rgba(0,0,0,0.7);
box-sizing: border-box;
display: ;
}
.shadow-main{
padding: 0rem 0 0.8rem 0;
text-align: center;
position: absolute;
top:45%;
left:50%;
transform:translate(-50%,-50%);
width: 76%;
background: url(../img/shadow_bg.png) no-repeat center;
background-size: 100% 100%;
}

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