只有在动画之后才能使用CSS隐藏/移除div所带的空格(Hide / remove space taken by div from html with css only after animation

我试图“物理”删除，或让div（例如）在隐藏后不占用屏幕上的空间。

我在#test div下面添加了另一个div，以显示在#test被隐藏后，它仍占用屏幕上的空间。 有没有办法让这个空间消失，只有CSS？

#test {
  opacity: 0;
  -webkit-animation: fadeinout 3s;
  /* Safari, Chrome and Opera > 12.1 */
  -moz-animation: fadeinout 3s;
  /* Firefox < 16 */
  -ms-animation: fadeinout 3s;
  /* Internet Explorer */
  -o-animation: fadeinout 3s;
  /* Opera < 12.1 */
  animation: fadeinout 3s;
}

@keyframes fadeinout {
  from {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

@-moz-keyframes fadeinout {
  /* Firefox */
  from {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

@-webkit-keyframes fadeinout {
  /* Safari and Chrome */
  from {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

@-o-keyframes fadeinout {
  /* Opera */
  from {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
} 
  
<div id="test">hide me after 3 seconds</div>
<div>After 3 seconds I don't move up.</div> 
  
 
I'm trying to "physically" remove, or have the div (for example) not take up space on the screen after hidden.
 
I added another div below the #test div to show that after #test is hidden, it still takes up space on the screen. Is there a way to have that space be gone, with css only?
 
 
 
  
  
#test {
  opacity: 0;
  -webkit-animation: fadeinout 3s;
  /* Safari, Chrome and Opera > 12.1 */
  -moz-animation: fadeinout 3s;
  /* Firefox < 16 */
  -ms-animation: fadeinout 3s;
  /* Internet Explorer */
  -o-animation: fadeinout 3s;
  /* Opera < 12.1 */
  animation: fadeinout 3s;
}

@keyframes fadeinout {
  from {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

@-moz-keyframes fadeinout {
  /* Firefox */
  from {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

@-webkit-keyframes fadeinout {
  /* Safari and Chrome */
  from {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

@-o-keyframes fadeinout {
  /* Opera */
  from {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
} 
  
<div id="test">hide me after 3 seconds</div>
<div>After 3 seconds I don't move up.</div> 
  
 

                
最满意答案
                
                    
                        
 你也可以动画最大高度 - 只要确保中间的最大高度比最高的衰落div高 
 
 
 
  
  
#test {
  opacity: 0;
  -webkit-animation: fadeinout 3s;
  /* Safari, Chrome and Opera > 12.1 */
  -moz-animation: fadeinout 3s;
  /* Firefox < 16 */
  -ms-animation: fadeinout 3s;
  /* Internet Explorer */
  -o-animation: fadeinout 3s;
  /* Opera < 12.1 */
  animation: fadeinout 3s;
    max-height: 0;
}

@keyframes fadeinout {
  from {
    max-height: 0;
    opacity: 0;
  }
  50% {
    opacity: 1;
    max-height: 5em;
  }
  to {
    opacity: 0;
    max-height: 0;
  }
} 
  
<div id="test">hide me after 3 seconds</div>
<div>After 3 seconds I don't move up.</div> 
  
 
You could also animate the max-height - just make sure that the middle max-height is taller than your tallest fading div
 
 
 
  
  
#test {
  opacity: 0;
  -webkit-animation: fadeinout 3s;
  /* Safari, Chrome and Opera > 12.1 */
  -moz-animation: fadeinout 3s;
  /* Firefox < 16 */
  -ms-animation: fadeinout 3s;
  /* Internet Explorer */
  -o-animation: fadeinout 3s;
  /* Opera < 12.1 */
  animation: fadeinout 3s;
    max-height: 0;
}

@keyframes fadeinout {
  from {
    max-height: 0;
    opacity: 0;
  }
  50% {
    opacity: 1;
    max-height: 5em;
  }
  to {
    opacity: 0;
    max-height: 0;
  }
} 
  
<div id="test">hide me after 3 seconds</div>
<div>After 3 seconds I don't move up.</div>