JS实现手风琴效果

代码实现

<div class="container">
  <div class="panel active" 
    style="background-image: url('https://images.unsplash.com/photo-1558979158-65a1eaa08691?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1350&q=80')">
    <h3>Explore The World</h3>
  </div>
  <div class="panel"
    style="background-image: url('https://images.unsplash.com/photo-1572276596237-5db2c3e16c5d?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1350&q=80')">
    <h3>Wild Forest</h3>
  </div>
  <div class="panel"
    style="background-image: url('https://images.unsplash.com/photo-1507525428034-b723cf961d3e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1353&q=80')">
    <h3>Sunny Beach</h3>
  </div>
  <div class="panel"
    style="background-image: url('https://images.unsplash.com/photo-1551009175-8a68da93d5f9?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1351&q=80')">
    <h3>City on Winter</h3>
  </div>
  <div class="panel"
    style="background-image: url('https://images.unsplash.com/photo-1549880338-65ddcdfd017b?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1350&q=80')">
    <h3>Mountains - Clouds</h3>
  </div>
</div>

let panels = document.querySelectorAll('.panel')
panels.forEach((item,index) => {
    item.addEventListener('click', ()=> {
        panels.forEach(panel => {
            panel.classList.remove('active')
        })
        document.querySelectorAll('.panel')[index].classList.add('active')
        
    })
})

*{
    box-sizing: border-box;
}
.body{
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.container{
    display: flex;
    width: 90vw;
}
.panel{
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    height: 80vh;
    flex: 0.5;
    border-radius: 60px;
    margin: 10px;
    position: relative;
    cursor: pointer;
    transition: flex 0.7s ease-in;
}
.panel h3{
    position: absolute;
    bottom: 20px;
    left: 20px;
    color: #fff;
    opacity: 0;
}
.panel.active{
    flex: 5;
}
.panel.active h3{
    opacity: 1;
    transition: opacity 0.3s ease-in 0.4s;
}
@media (max-width: 480px){
    .container{
        width: 100vw;
    }
    .panel:nth-of-type(4),.panel:nth-of-type(5){
        display: none;
    }
}

效果实现