在悬停时创建反弹效果

Question

我必须开发一个类似的网站，如http://www.unlocknrepair.com/在这个网站上，当你的鼠标悬停在解锁或手机维修按钮，一个下拉菜单出现。有没有办法让这个下拉列表以一种有弹性的方式出现？就像我想让它在稳定之前反弹一下。这在jQuery中是可能的，但是仅仅使用css和javascript就可以做到吗？

Answer 1

如果可以选择实验性的css3，那么即使没有javascript，也可以使用css动画和@keyframes规则来实现。

​

#parent {
    position:relative;
     height: 40px;
}

#onhover {
    display: none;
    position: absolute;
    top: 0;
    
}

#parent:hover #onhover {
    display: block;
    top: 30px;
    animation:mymove 0.8s linear;
    -moz-animation:mymove 0.8s linear; /* Firefox */
    -webkit-animation:mymove 0.8s linear; /* Safari and Chrome */
    -o-animation:mymove 0.8s linear; /* Opera */
    -ms-animation:mymove 0.8s linear; /* IE */
}

@keyframes mymove
{
0%   {top:0px;}
10%  {top:3px;}
40%  {top:40px;}
60%  {top:25px;}
80%  {top:35px;}
100% {top:30px;}
}

@-moz-keyframes mymove /* Firefox */
{
0%   {top:0px;}
10%  {top:3px;}
40%  {top:40px;}
60%  {top:25px;}
80%  {top:35px;}
100% {top:30px;}
}

@-webkit-keyframes mymove /* Safari and Chrome */
{
0%   {top:0px;}
10%  {top:3px;}
40%  {top:40px;}
60%  {top:25px;}
80%  {top:35px;}
100% {top:30px;}
}

@-o-keyframes mymove /* Opera */
{
0%   {top:0px;}
10%  {top:3px;}
40%  {top:40px;}
60%  {top:25px;}
80%  {top:35px;}
100% {top:30px;}
}

@-ms-keyframes mymove /* IE */
{
0%   {top:0px;}
10%  {top:3px;}
40%  {top:40px;}
60%  {top:25px;}
80%  {top:35px;}
100% {top:30px;}
}

<div id="parent">hover me<div id="onhover">hovering</div></div>

​

另一个“反弹”动画：

​

$(function() {

$(document.body).delegate( "img", "mouseenter", function() {
    var $this = $(this).addClass("right");
    setTimeout(function() {
        $this.removeClass("right");
    }, 2000);
});
    
});

body { font-size: .7em; font-family: Arial, Helvetica, "Liberation Sans", sans-serif; padding: 0 !important; }
img {
    -moz-transition: -moz-transform 1s ease-in;
    -webkit-transition: -webkit-transform 1s ease-in;
    -o-transition: -o-transform 1s ease-in;
    -ms-transition: -ms-transform 1s ease-in;
}
#anim.right {
    -moz-animation-name: bounce;
    -moz-animation-duration: 1s;
    -moz-animation-iteration-count: 1;
    -moz-transform: translate(400px);
    -moz-transition: none;

    -webkit-animation-name: bounce;
    -webkit-animation-duration: 1s;
    -webkit-animation-iteration-count: 1;
    -webkit-transform: translate(400px);
    -webkit-transition: none;
}

@-moz-keyframes bounce {
  from {
    -moz-transform: translate(0px);
    -moz-animation-timing-function: ease-in;
  }
  60% {
    -moz-transform: translate(400px);
    -moz-animation-timing-function: ease-out;
  }
  73% {
    -moz-transform: translate(360px);
    -moz-animation-timing-function: ease-in;
  }
  86% {
    -moz-transform: translate(400px);
    -moz-animation-timing-function: ease-out;
  }
  93% {
    -moz-transform: translate(380px);
    -moz-animation-timing-function: ease-in;
  }
  to {
    -moz-transform: translate(400px);
    -moz-animation-timing-function: ease-out;
  }
}

@-webkit-keyframes bounce {
  from {
    -webkit-transform: translate(0px);
    -webkit-animation-timing-function: ease-in;
  }
  60% {
    -webkit-transform: translate(400px);
    -webkit-animation-timing-function: ease-out;
  }
  73% {
    -webkit-transform: translate(360px);
    -webkit-animation-timing-function: ease-in;
  }
  86% {
    -webkit-transform: translate(400px);
    -webkit-animation-timing-function: ease-out;
  }
  93% {
    -webkit-transform: translate(380px);
    -webkit-animation-timing-function: ease-in;
  }
  to {
    -webkit-transform: translate(400px);
    -webkit-animation-timing-function: ease-out;
  }
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
<img id="anim" src="http://hacks.mozilla.org/wp-content/uploads/2011/04/75px-Aurora210.png" width="75" height="75" />

​

有关更多详细信息和浏览器兼容性，请参阅Mozilla Developer Network。

Answer 2

是的，使用原生javascript是可能的。Take a look at this document

请注意，我链接到"easeOut“部分，因为我认为这代表了一个球的弹跳比他们的”弹跳“要好一点。

Here's a good example, further down the same page.