.tianja{
display: block;
}
.tanchuanga{
display:none;
width: 100%;
background-color: #fff;
z-index: 999;
position: absolute;
bottom: 1rem;
border-radius: 10px 10px 0px 0px;
box-shadow: 0 10px 20px 0 rgba(19, 219, 148, 0.2);
height: 80vh;
}
<div class="tianja zjz">
<div class="tjxx">+添加信息</div>
</div>
<div class="tanchuanga">
<div style="display: flex; justify-content: space-between;">
<div class="tyyxx">请填写OD左眼信息</div>
<div class="closed">关</div>
</div>
<div>
弹窗内容
</div>
</div>
<script>
const tianjia = document.querySelector('.tianja')
const tanchuang = document.querySelector('.tanchuanga')
const guanbi = document.querySelector('.closed')
tianjia.addEventListener('click', () => {
tanchuang.style.display = 'block'
})
guanbi.addEventListener('click', () => {
tanchuang.style.display = 'none'
})
</script>
