我试图在没有固定背景高度的情况下获得纯 CSS 视差效果。这已在 few 中进行了描述places , 但它们有一个共同的约束条件，即背景层必须具有固定的已知高度。
由于某些动态内容，我希望在没有固定的、已知的背景高度的情况下实现效果。
我的最小示例在这里:https://jsfiddle.net/yf8oyben/
#container {
position: fixed;
top: 0;
left: 0;
right: 0;
bottom: 0;
perspective: 1px;
overflow-x: hidden;
overflow-y: scroll;
}
.background {
transform: translateZ(-1px) scale(2);
width: 100%;
background: lightgreen;
height: 250px; /* Assumes bg height */
position: absolute; /* Assumes bg height */
top: calc(125px - 50vh); /* Assumes bg height */
}
.foreground {
background: rgba(0, 0, 255, 0.5);
width: 100%;
position: absolute; /* Assumes bg height */
top: 250px; /* Assumes bg height */
}<body>
<div id='container'>
<div id="group1">
<div class="background">
<div style="height: 10rem"></div>
<center>Banner</center>
<div style="height: 10rem"></div>
</div>
<div class="foreground">
<div style="height: 10rem"></div>
<center>Content</center>
<div style="height: 100rem"></div>
</div>
</div>
</div>
</body>它现在可以工作，但假定背景为 250 像素，如 CSS 中所注释。是否可以删除它并仍然保留当前的效果？
最佳答案
您可以在不知道横幅高度的情况下实现这种视差效果。您只需要放弃绝对定位并调整 perspective-origin 和 transform-orign 属性，它们需要一个放在另一个之上。
这是一个演示:CSS only parallax effect
*{margin:0;padding:0;}
#wrap{
position:fixed;
width:100%; height:100%;
overflow-x:hidden;
overflow-y:scroll;
perspective: 1px;
perspective-origin:0 0;
}
.bg{
background:teal;
transform-origin:0 0;
transform: translateZ(-1px) scale(2);
}
.bg img{
display:block;
width:100%; height:auto;
}
.cont{
position:relative;
background:rgba(0,0,0,0.8);
color:#fff;
padding:5%;
}
.cont *{
max-width:900px;
margin:5% auto;
}<div id="wrap">
<div class="bg">
<img src="http://i.imgur.com/hPLqUtN.jpg" alt="" />
</div>
<div class="cont">
<h1>Lorem Ipsum</h1>
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</div>
</div>关于css - 没有固定背景高度的纯 CSS 视差？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38693533/