我正在尝试创建一个下拉菜单,当我将鼠标悬停在该菜单上时会向下滑动,而当我将鼠标悬停在菜单触发器上时会再次向上滑动。向下滑动的效果很好,但是我无法向上滑动的效果。如果可以使用纯CSS解决方案,那就太好了。这是我的jsfiddle:https ://jsfiddle.net/kp073okj/对于现在想要代码的你们来说,这里是:
HTML代码:
<div class="Dropdown">
<img src="Images/Dropdown.png" class="Dropdown-Button">
<div class="Dropdown-Content">
<a href="#">Informationen</a>
<a href="#">SocialMedia</a>
<a href="#">Anmeldung</a>
<a href="#">Dokumentation</a>
</div>
</div>
CSS代码:
.Dropdown {
position: fixed;
z-index: 250;
display: block;
width: 2%;
height: auto;
margin-left: 80%;
}
.Dropdown-Button {
position: relative;
z-index: 280;
font-size: 1.6vw;
border: none;
padding-bottom: 0.5em;
width: 100%;
height: auto;
margin-top: 1em;
}
.Dropdown-Content {
height: 0;
overflow: hidden;
}
.Dropdown-Content a {
color: white;
text-decoration: none;
padding: 0.5em 4.65em 0.5em 0.8em;
display: block;
text-align: left;
font-size: 1.6vw;
}
.Dropdown:hover .Dropdown-Content {
display: block;
height: 400%;
animation-name: dropdown;
animation-duration: 1s;
position: absolute;
z-index: 280;
background-color: #303030;
text-align: left;
margin-left: -0.8em;
}
.Dropdown-Content a:hover {
background-color: #555;
}
@keyframes dropdown {
0% {height: 0%; transition: height 2s;}
100% {height: 400%; transition: height 2s;}
}
更好的方法可能是简单地使用过渡来更改高度,而不使用动画。毕竟,您只是在为过渡设置动画。
简而言之..这里的动画有什么价值?
body { margin: 50px; background: #aaa;}
.Dropdown {
position: fixed;
z-index: 250;
display: block;
width: 2%;
height: auto;
/* margin-left: 80% commented out for snippet */;
}
.Dropdown-Button {
position: relative;
z-index: 280;
font-size: 1.6vw;
border: none;
padding-bottom: 0.5em;
width: 100%;
height: auto;
margin-top: 1em;
}
.Dropdown-Content {
display: block;
height: 0%;
position: absolute;
z-index: 280;
background-color: #303030;
text-align: left;
margin-left: -0.8em;
overflow: hidden;
transition: height 2s;
}
.Dropdown-Content a {
color: white;
text-decoration: none;
padding: 0.5em 4.65em 0.5em 0.8em;
display: block;
text-align: left;
font-size: 1.6vw;
}
.Dropdown:hover .Dropdown-Content {
height: 400%;
transition: height 2s;
}
.Dropdown-Content a:hover {
background-color: #555;
}
<div class="Dropdown">
<img src="http://placehold.it/140x140" class="Dropdown-Button">
<div class="Dropdown-Content">
<a href="#">Informationen</a>
<a href="#">SocialMedia</a>
<a href="#">Anmeldung</a>
<a href="#">Dokumentation</a>
</div>
</div>
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