javascript - 具有当前 View 位置的 css 动画整页

Question

我用 css 创建了两个动画 https://codepen.io/anon/pen/yOqxdq html 和 css

<img onclick="show(this);" src="http://tigersincrisis.com/wp-content/uploads/2014/01/image_21.jpg">

@keyframes shadow {
    0%   { opacity: 0;height: 0; transform : scale(0.1);}
    100% { opacity: 1; height: 100%;transform : scale(1);}
}
@keyframes show {
    0%   { opacity: 0;margin: 20% auto;width: 20%;height: 20%;}
    100% { opacity: 1;margin: 0; width: 100%;height: 100%;}
}
#show {
    position: absolute; 
    left: 0;
    bottom: 0; 
    text-align: center;
    background-color: rgba(0, 0, 0, 0.76);
    animation-name: show;
    animation-duration: 2s;
    animation-fill-mode: forwards;
    z-index: 5;
}
#show-item{

    position: relative;
    margin: 0 auto;
    animation-name: shadow;
    animation-duration: 3s;
    animation-fill-mode: forwards;
     opacity: 0;
    padding-top: 40px;
}
#show-item img{
    border: 4px solid black;

}
a#closeShow{
    position: relative;
    float: right;
    text-decoration: none;
    color: #C8C8C8;
    padding: 6px 10px;
    background: rgba(0, 0, 0, 0.9);
    border-radius: 26px;
    height: 18px;
    position: relative;
    top: 25px;
    left: 10px;
    border: 2px solid #e0e0e0;
    box-shadow: 0 0 2px black;
}

问题是当用户滚动时， View 发生变化，具有绝对位置的 div 保持在上方，并且显示框不显示在页面下方的部分

Answer 1

尝试 position: fixed; #show。

演示:FIDDLE