我创建了一个下拉菜单。当用户将鼠标悬停在导航按钮上时,使用CSS3 Transitions,类'dropdown-content'会淡入,如下面的演示所示:
https://jsfiddle.net/4xk78qse/
我无法弄清楚当用户没有悬停在任何按钮上时,如何淡出'下拉内容'。
我确实尝试添加
animation fadeout 2s;
@keyframes fadeout {
from { opacity: 1; }
to { opacity: 0; }
}
基本上与jsfiddle示例中的动画淡出相反,但这不起作用。
总之,当用户没有悬停在任何按钮上时,我希望淡出。
答案 0 :(得分:2)
这里的诀窍是使用CSS Transitions而不是CSS动画。您将设置opacity
和.dropdown-content {
visibility: hidden;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
-webkit-transition: opacity 2s, visibility 2s;
-moz-transition: opacity 2s, visibility 2s;
-ms-transition: opacity 2s, visibility 2s;
-o-transition: opacity 2s, visibility 2s;
transition: opacity 2s, visibility 2s;
opacity: 0;
}
.dropdown:hover .dropdown-content {
visibility: visible;
opacity: 1;
}
而不是显示。
$hours = 0.5;
$rate = 100;
$overtime = max($hours - 40, 0);
$pay = $overtime * $rate * 1.5;
$pay += ($hours - $overtime) * $rate;
$pay = $pay + ($pay * 0.05);
echo "Hours Traveled: " . $hours . "<br>";
echo "Transport rate (per hour): $" . number_format($rate, 2) . "<br>";
echo "Additional Hours: " . $overtime . "<br>";
echo "Your Total is: $" . number_format($pay, 2) . "<br>";
以下是您要完成的工作演示: https://jsfiddle.net/4xk78qse/9/
答案 1 :(得分:1)
你最好使用过渡来代替这样的关键帧动画:
.dropdown-content {
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
opacity: 0;
transition: all 1s;
}
答案 2 :(得分:0)
你需要这个css,因为当悬停结束你的悬停类变换&#34; .dropdown。dropdown-content&#34;。然后你只为下拉内容调用fadeout。
.dropdown .dropdown-content{
display: block;
opacity: 1;
-webkit-animation: fadeout 2s;
-moz-animation: fadeout 2s;
-ms-animation: fadeout 2s;
-o-animation: fadeout 2s;
animation: fadeout 2s;
opacity: 0;
}
@keyframes fadeout {
from { opacity: 1; }
to { opacity: 0; }
}