Files
freeCodeCamp/curriculum/challenges/chinese-traditional/01-responsive-web-design/applied-visual-design/animate-elements-continually-using-an-infinite-animation-count.md
Nicholas Carrigan (he/him) 3da4be21bb chore: seed chinese traditional (#42005)
Seeds the chinese traditional files manually so we can deploy to
staging.
2021-05-05 22:43:49 +05:30

2.0 KiB

id, title, challengeType, videoUrl, forumTopicId, dashedName
id title challengeType videoUrl forumTopicId dashedName
587d78a8367417b2b2512ae3 使用無限的動畫計數製作永不停止的動畫 0 https://scrimba.com/c/cVJDVfq 301041 animate-elements-continually-using-an-infinite-animation-count

--description--

之前的關卡里介紹了一些動畫屬性以及 @keyframes 規則的用法。 還有一個常用的動畫屬性是 animation-iteration-count,這個屬性允許你控制動畫循環的次數。 下面是一個例子:

animation-iteration-count: 3;

在這裏動畫會在運行 3 次後停止,如果想讓動畫一直運行,可以把值設置成 infinite

--instructions--

animation-iteration-count 屬性改成 infinite,使右邊的球一直跳躍。

--hints--

animation-iteration-count 屬性的值應爲 infinite

assert($('#ball').css('animation-iteration-count') == 'infinite');

--seed--

--seed-contents--

<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>

--solutions--

<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: infinite;
  }

  @keyframes bounce{
    0% {
      top: 0px;
    }
    50% {
      top: 249px;
      width: 130px;
      height: 70px;
    }
    100% {
      top: 0px;
    }
  }
</style>
<div id="ball"></div>