2.2 KiB
2.2 KiB
id | title | challengeType | videoUrl | localeTitle |
---|---|---|---|---|
587d78a8367417b2b2512ae5 | Animate Elements at Variable Rates | 0 | 以可变速率动画元素 |
Description
animation-iteration-count
属性和设置@keyframes
规则来实现的。为了说明,右侧的动画由两个“星星”组成,每个“星星”的大小和不透明度在@keyframes
规则中的20%标记处@keyframes
,从而创建闪烁动画。您可以更改其中一个元素的@keyframes
规则,以便星星以不同的速率闪烁。 Instructions
@keyframes
规则更改为50%,更改类名为star-1
的元素的动画速率。 Tests
tests:
- text: <code>star-1</code>类的<code>@keyframes</code>规则应为50%。
testString: 'assert(code.match(/twinkle-1\s*?{\s*?50%/g), "The <code>@keyframes</code> rule for the <code>star-1</code> class should be 50%.");'
Challenge Seed
<style>
.stars {
background-color: white;
height: 30px;
width: 30px;
border-radius: 50%;
animation-iteration-count: infinite;
}
.star-1 {
margin-top: 15%;
margin-left: 60%;
animation-name: twinkle-1;
animation-duration: 1s;
}
.star-2 {
margin-top: 25%;
margin-left: 25%;
animation-name: twinkle-2;
animation-duration: 1s;
}
@keyframes twinkle-1 {
20% {
transform: scale(0.5);
opacity: 0.5;
}
}
@keyframes twinkle-2 {
20% {
transform: scale(0.5);
opacity: 0.5;
}
}
#back {
position: fixed;
padding: 0;
margin: 0;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: linear-gradient(black, #000099, #66c2ff, #ffcccc, #ffeee6);
}
</style>
<div id="back"></div>
<div class="star-1 stars"></div>
<div class="star-2 stars"></div>
Solution
// solution required