H5页面蒙版层

<div v-show="modalStatus" class="mio-modal-mask"></div>

.mio-modal-mask {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 888;
    transition: all 0.3s ease-in-out;
    opacity: 1;
    visibility: visible;
}