过渡以淡化元素不起作用

Question

我的代码有问题，可能有人知道解决方案。

我创建了一些卡片，我想当我点击其中一个新的更大的卡片出现在上面。我用for循环很容易地做到了，但问题是过渡，我想设置一个平滑的过渡。

大卡的初始状态为display: none;和opacity: 0;我知道我们不能褪色显示无元素，但我的想法是先设置一个display: block，然后opacity: 1与css中的过渡属性在"card-open">

元素。但是转换不工作，这让我疯狂，因为我不知道为什么

我在这里分享codependency链接:https://codepen.io/arnaudhrt/pen/VwWBLze

和javascript代码:

const Card = document.querySelectorAll('.card')
const CardOpen = document.querySelectorAll('.card-open')
const btnClose = document.querySelectorAll('.close')

for(let i = 0 ; i < Card.length ; i++) {
Card[i].addEventListener('click', function() {
CardOpen[i].style.display = 'block'
CardOpen[i].style.opacity = '1'
});
btnClose[i].addEventListener('click', () => {
CardOpen[i].style.opacity = '0'
CardOpen[i].style.display = 'none'
})
}

PS:我不能设置显示块，只是切换不透明度，因为如果我这样做，我不能使用其他卡片与z-index。

Answer 1

你可以用可见性来代替显示，显示在css中没有过渡效果。

const Card = document.querySelectorAll('.card')
const CardOpen = document.querySelectorAll('.card-open')
const btnClose = document.querySelectorAll('.close')

for(let i = 0 ; i < Card.length ; i++) {
Card[i].addEventListener('click', function() {
CardOpen[i].style.visibility = 'visible'
CardOpen[i].style.opacity = '1'
});
btnClose[i].addEventListener('click', () => {
CardOpen[i].style.opacity = '0'
CardOpen[i].style.visibility = 'hidden'
})
}

body {
background: #565279;
width: 100vw;
height: 100vh;
display: flex;
}
.container-card {
max-width: 1200px;
margin: auto;
display: flex;
flex-wrap: wrap;
align-content: center;
position: relative;
transition: all 0.4s ease-in-out;
}
.card {
width: 200px;
height: 200px;
background: crimson;
margin: 20px;
cursor: pointer;
transition: all 0.4s ease-in-out;
}
.card-open {
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
background: #333;
visibility: hidden;
opacity: 0;
transition: all 0.4s ease-in-out;
}
.card-open span {
color: #fff;
position: absolute;
bottom: 30px;
left: 50%;
transform:translateX(-50%);
cursor: pointer;
}

<div class="container-card">
<div class="card card1"></div>
<div class="card card2"></div>
<div class="card card3"></div>
<div class="card card4"></div>
<div class="card card5"></div>
<div class="card card6"></div>
<div class="card card7"></div>
<div class="card card8"></div>
<div class="card card9"></div>
<div class="card card10"></div>
<div class="card-open open1"><span class="close">close</span></div>
<div class="card-open open2"><span class="close">close</span></div>
<div class="card-open open3"><span class="close">close</span></div>
<div class="card-open open4"><span class="close">close</span></div>
<div class="card-open open5"><span class="close">close</span></div>
<div class="card-open open6"><span class="close">close</span></div>
<div class="card-open open7"><span class="close">close</span></div>
<div class="card-open open8"><span class="close">close</span></div>
<div class="card-open open9"><span class="close">close</span></div>
<div class="card-open open10"><span class="close">close</span></div>
</div>