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freeCodeCamp/curriculum/challenges/chinese/01-responsive-web-design/applied-visual-design/animate-elements-continually-using-an-infinite-animation-count.chinese.md

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---
id: 587d78a8367417b2b2512ae3
title: Animate Elements Continually Using an Infinite Animation Count
challengeType: 0
videoUrl: 'https://scrimba.com/c/cVJDVfq'
forumTopicId: 301041
localeTitle: 使用无限的动画计数制作永不停止的动画
---
## Description
<section id='description'>
之前的关卡里介绍了一些动画属性以及 <code>@keyframes</code> 规则的用法。还有一个常用的动画属性是 <code>animation-iteration-count</code>,这个属性允许你控制动画循环的次数。下面是一个例子:
<code>animation-iteration-count: 3;</code>
在这里动画会在运行 3 次后停止,如果想让动画一直运行,可以把值设置成 infinite。
</section>
## Instructions
<section id='instructions'>
<code>animation-iteration-count</code> 属性改成 infinite以使右边的球持续跳跃。
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: '<code>animation-iteration-count</code> 属性值应该为 infinite。'
testString: assert($('#ball').css('animation-iteration-count') == 'infinite', '<code>animation-iteration-count</code> 属性值应该为 infinite。');
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='html-seed'>
```html
<style>
#ball {
width: 100px;
height: 100px;
margin: 50px auto;
position: relative;
border-radius: 50%;
background: linear-gradient(
35deg,
#ccffff,
#ffcccc
);
animation-name: bounce;
animation-duration: 1s;
animation-iteration-count: 3;
}
@keyframes bounce{
0% {
top: 0px;
}
50% {
top: 249px;
width: 130px;
height: 70px;
}
100% {
top: 0px;
}
}
</style>
<div id="ball"></div>
```
</div>
</section>
## Solution
<section id='solution'>
```html
// solution required
```
</section>