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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, title, challengeType, videoUrl, forumTopicId, localeTitle
id title challengeType videoUrl forumTopicId localeTitle
587d78a8367417b2b2512ae3 Animate Elements Continually Using an Infinite Animation Count 0 https://scrimba.com/c/cVJDVfq 301041 使用无限的动画计数制作永不停止的动画

Description

之前的关卡里介绍了一些动画属性以及 @keyframes 规则的用法。还有一个常用的动画属性是 animation-iteration-count,这个属性允许你控制动画循环的次数。下面是一个例子: animation-iteration-count: 3; 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。

Instructions

animation-iteration-count 属性改成 infinite以使右边的球持续跳跃。

Tests

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。');

Challenge Seed

<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>

Solution

// solution required