CSS 过渡自动高度不起作用
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CSS transition auto height not working
提问by Just me
I have a website, and I decided to replace the jquery based toggle boxes with pure CSS snippets. When I use fixed height value for the transition (last lines of the CSS), it works well, but with the autovalue, the animation is missing, only the height change has an effect!
我有一个网站，我决定用纯 CSS 片段替换基于 jquery 的切换框。当我使用固定高度值进行过渡（CSS 的最后几行）时，效果很好，但是使用该auto值时，动画丢失了，只有高度变化才有效果！
Is there a way to use this with auto value? I would like to use variable texts and no scripts.
有没有办法将它与自动值一起使用？我想使用可变文本而不是脚本。
.ac-container{
width: 400px;
margin: 10px auto 30px auto;
text-align: left;
}
.ac-container label{
font-family: 'BebasNeueRegular', 'Arial Narrow', Arial, sans-serif;
padding: 5px 20px;
position: relative;
z-index: 20;
display: block;
height: 30px;
cursor: pointer;
color: #777;
text-shadow: 1px 1px 1px rgba(255,255,255,0.8);
line-height: 33px;
font-size: 19px;
background: #ffffff;
background: -moz-linear-gradient(top, #ffffff 1%, #eaeaea 100%);
background: -webkit-gradient(linear, left top, left bottom, color-stop(1%,#ffffff), color-stop(100%,#eaeaea));
background: -webkit-linear-gradient(top, #ffffff 1%,#eaeaea 100%);
background: -o-linear-gradient(top, #ffffff 1%,#eaeaea 100%);
background: -ms-linear-gradient(top, #ffffff 1%,#eaeaea 100%);
background: linear-gradient(top, #ffffff 1%,#eaeaea 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#eaeaea',GradientType=0 );
box-shadow:
0px 0px 0px 1px rgba(155,155,155,0.3),
1px 0px 0px 0px rgba(255,255,255,0.9) inset,
0px 2px 2px rgba(0,0,0,0.1);
}
.ac-container label:hover{
background: #fff;
}
.ac-container input:checked + label,
.ac-container input:checked + label:hover{
background: #c6e1ec;
color: #3d7489;
text-shadow: 0px 1px 1px rgba(255,255,255, 0.6);
box-shadow:
0px 0px 0px 1px rgba(155,155,155,0.3),
0px 2px 2px rgba(0,0,0,0.1);
}
.ac-container input{
display: none;
}
.ac-container section{
background: rgba(255, 255, 255, 0.5);
margin-top: -1px;
overflow: hidden;
height: 0px;
position: relative;
z-index: 10;
-webkit-transition: height 0.3s ease-in-out, box-shadow 0.6s linear;
-moz-transition: height 0.3s ease-in-out, box-shadow 0.6s linear;
-o-transition: height 0.3s ease-in-out, box-shadow 0.6s linear;
-ms-transition: height 0.3s ease-in-out, box-shadow 0.6s linear;
transition: height 0.3s ease-in-out, box-shadow 0.6s linear;
}
.ac-container section p{
font-style: italic;
color: #777;
line-height: 23px;
font-size: 14px;
padding: 20px;
text-shadow: 1px 1px 1px rgba(255,255,255,0.8);
}
.ac-container input:checked ~ section{
-webkit-transition: height 0.5s ease-in-out, box-shadow 0.1s linear;
-moz-transition: height 0.5s ease-in-out, box-shadow 0.1s linear;
-o-transition: height 0.5s ease-in-out, box-shadow 0.1s linear;
-ms-transition: height 0.5s ease-in-out, box-shadow 0.1s linear;
transition: height 0.5s ease-in-out, box-shadow 0.1s linear;
box-shadow: 0px 0px 0px 1px rgba(155,155,155,0.3);
}
.ac-container input:checked ~ section.ac-small{
height: 120px; /*auto*/
}<div class="ac-container">
<div>
<input id="ac-1" name="accordion-1" type="checkbox" />
<section class="ac-small">
<p>Some content... </p>
</section>
<label for="ac-1">About us</label>
</div>
<div>
<input id="ac-2" name="accordion-2" type="checkbox" />
<section class="ac-small">
<p>Some content... </p>
</section>
<label for="ac-2">About us</label>
</div>
</div>回答by Christofer Vilander
One solution if you just want to use CSS is to transition max-heightinstead of heightand set it to something greater than it will ever get ...
如果您只想使用 CSS，一种解决方案是过渡max-height而不是height将其设置为比以往任何时候都更大的东西......
Here's a DEMO
这是一个演示
You will need to tweek the speed of the transition a bit, but at least the example gives you an idea on how it can be done. Don't forget to change the property in your transition as well. From transition: height 0.5s;to transition: max-height 0.5s;.
您需要稍微调整转换速度，但至少该示例让您了解如何完成。不要忘记在转换中更改属性。从transition: height 0.5s;到transition: max-height 0.5s;。
Hope this helps!
希望这可以帮助！
.ac-container{
width: 400px;
margin: 10px auto 30px auto;
text-align: left;
}
.ac-container label{
font-family: 'BebasNeueRegular', 'Arial Narrow', Arial, sans-serif;
padding: 5px 20px;
position: relative;
z-index: 20;
display: block;
height: 30px;
cursor: pointer;
color: #777;
text-shadow: 1px 1px 1px rgba(255,255,255,0.8);
line-height: 33px;
font-size: 19px;
background: #ffffff;
background: -moz-linear-gradient(top, #ffffff 1%, #eaeaea 100%);
background: -webkit-gradient(linear, left top, left bottom, color-stop(1%,#ffffff), color-stop(100%,#eaeaea));
background: -webkit-linear-gradient(top, #ffffff 1%,#eaeaea 100%);
background: -o-linear-gradient(top, #ffffff 1%,#eaeaea 100%);
background: -ms-linear-gradient(top, #ffffff 1%,#eaeaea 100%);
background: linear-gradient(top, #ffffff 1%,#eaeaea 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#eaeaea',GradientType=0 );
box-shadow:
0px 0px 0px 1px rgba(155,155,155,0.3),
1px 0px 0px 0px rgba(255,255,255,0.9) inset,
0px 2px 2px rgba(0,0,0,0.1);
}
.ac-container label:hover{
background: #fff;
}
.ac-container input:checked + label,
.ac-container input:checked + label:hover{
background: #c6e1ec;
color: #3d7489;
text-shadow: 0px 1px 1px rgba(255,255,255, 0.6);
box-shadow:
0px 0px 0px 1px rgba(155,155,155,0.3),
0px 2px 2px rgba(0,0,0,0.1);
}
.ac-container input{
display: none;
}
.ac-container section{
background: rgba(255, 255, 255, 0.5);
margin-top: -1px;
overflow: hidden;
max-height: 0px;
position: relative;
z-index: 10;
-webkit-transition: max-height 0.3s ease-in-out, box-shadow 0.6s linear;
-moz-transition: max-height 0.3s ease-in-out, box-shadow 0.6s linear;
-o-transition: max-height 0.3s ease-in-out, box-shadow 0.6s linear;
-ms-transition: max-height 0.3s ease-in-out, box-shadow 0.6s linear;
transition: max-height 0.3s ease-in-out, box-shadow 0.6s linear;
}
.ac-container section p{
font-style: italic;
color: #777;
line-height: 23px;
font-size: 14px;
padding: 20px;
text-shadow: 1px 1px 1px rgba(255,255,255,0.8);
}
.ac-container input:checked ~ section{
-webkit-transition: max-height 0.5s ease-in-out, box-shadow 0.1s linear;
-moz-transition: max-height 0.5s ease-in-out, box-shadow 0.1s linear;
-o-transition: max-height 0.5s ease-in-out, box-shadow 0.1s linear;
-ms-transition: max-height 0.5s ease-in-out, box-shadow 0.1s linear;
transition: max-height 0.5s ease-in-out, box-shadow 0.1s linear;
box-shadow: 0px 0px 0px 1px rgba(155,155,155,0.3);
}
.ac-container input:checked ~ section.ac-small{
max-height: 500px; /*auto*/
}<div class="ac-container">
<div>
<input id="ac-1" name="accordion-1" type="checkbox" />
<section class="ac-small">
<p>Some content...Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... Some content... </p>
</section>
<label for="ac-1">About us</label>
</div>
<div>
<input id="ac-2" name="accordion-2" type="checkbox" />
<section class="ac-small">
<p>Some content... </p>
</section>
<label for="ac-2">About us</label>
</div>
</div>回答by jhurshman
You can't animate to or from a dimension of "auto" (unfortunately). My usual approach for this is to animate the height of an outer DIV which has a single child which is a style-less DIV used only for measuring the content height.
您不能在“自动”维度上设置动画（不幸的是）。我通常的方法是为外部 DIV 的高度设置动画，该 DIV 有一个子项，这是一个仅用于测量内容高度的无样式 DIV。
function growDiv() {
var growDiv = document.getElementById('grow');
if (growDiv.clientHeight) {
growDiv.style.height = 0;
} else {
var wrapper = document.querySelector('.measuringWrapper');
growDiv.style.height = wrapper.clientHeight + "px";
}
}#grow {
-moz-transition: height .5s;
-ms-transition: height .5s;
-o-transition: height .5s;
-webkit-transition: height .5s;
transition: height .5s;
height: 0;
overflow: hidden;
outline: 1px solid red;
}<input type="button" onclick="growDiv()" value="grow">
<div id='grow'>
<div class='measuringWrapper'>
<div>
The contents of my div.
</div>
<div>
The contents of my div.
</div>
<div>
The contents of my div.
</div>
<div>
The contents of my div.
</div>
<div>
The contents of my div.
</div>
<div>
The contents of my div.
</div>
</div>
</div>回答by dotnetCarpenter
You should use scaleY.
您应该使用 scaleY。
ul {
background-color: #eee;
transform: scaleY(0);
transform-origin: top;
transition: transform 0.3s ease-in-out;
}
p:hover ~ ul {
transform: scaleY(1);
}<p>Here (scaleY(1))</p>
<ul>
<li>Coffee</li>
<li>Tea</li>
<li>Milk</li>
</ul>Or you can use clipto cutthe list.
或者您可以使用clip来剪切列表。
ul {
clip: rect(auto, auto, 0, auto);
position: absolute;
left: 0;
margin: 0;
padding: 0;
color: white;
background-color: rgba(0, 0, 0, 0.8);
transition-delay: 0.29s;
transition-property: clip;
transition-duration: 0.5s;
transition-timing-function: cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
h3:hover ~ ul,
h3:active ~ ul {
clip: rect(auto, auto, 10rem, auto);
}<h3>Hover here</h3>
<ul>
<li>This</li>
<li>list</li>
<li>is</li>
<li>clipped.</li>
<li>A clip</li>
<li>transition</li>
<li>will</li>
<li>show it</li>
</ul>
<p>
Some text...
</p>回答by Ali
CSS transition doesn't work with auto value. Get the scroll height with JavaScript el.scrollHeightor use max-height instead.
CSS 过渡不适用于自动值。使用 JavaScript 获取滚动高度el.scrollHeight或使用 max-height 代替。
回答by Zeta
autoisn't an appropriate type for an animatable property, see CSS Transitions: 7. Animatable properties. You need either a length (px,em,...) or percentage (13.37%).
auto不是可动画属性的合适类型，请参阅CSS Transitions: 7. Animatable properties。您需要长度 ( px, em,...) 或百分比 ( 13.37%)。
Thus a CSS only solution isn't possible, as long as autoisn't added to the list. You'll need to use JavaScript or a specific length value.
因此，仅 CSS 的解决方案是不可能的，只要auto不添加到列表中即可。您需要使用 JavaScript 或特定的长度值。
