3.5 KiB
3.5 KiB
id | title | challengeType | videoUrl | forumTopicId |
---|---|---|---|---|
587d78a8367417b2b2512ae6 | Animate Multiple Elements at Variable Rates | 0 | https://scrimba.com/c/cnpWZc9 | 301042 |
Description
@keyframes
rules. You can achieve the same goal by manipulating the animation-duration
of multiple elements.
In the animation running in the code editor, there are three "stars" in the sky that twinkle at the same rate on a continuous loop. To make them twinkle at different rates, you can set the animation-duration
property to different values for each element.
Instructions
animation-duration
of the elements with the classes star-1
, star-2
, and star-3
to 1s, 0.9s, and 1.1s, respectively.
Tests
tests:
- text: The <code>animation-duration</code> property for the star with class <code>star-1</code> should remain at 1s.
testString: assert($('.star-1').css('animation-duration') == '1s');
- text: The <code>animation-duration</code> property for the star with class <code>star-2</code> should be 0.9s.
testString: assert($('.star-2').css('animation-duration') == '0.9s');
- text: The <code>animation-duration</code> property for the star with class <code>star-3</code> should be 1.1s.
testString: assert($('.star-3').css('animation-duration') == '1.1s');
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-duration: 1s;
animation-name: twinkle;
}
.star-2 {
margin-top: 25%;
margin-left: 25%;
animation-duration: 1s;
animation-name: twinkle;
}
.star-3 {
margin-top: 10%;
margin-left: 50%;
animation-duration: 1s;
animation-name: twinkle;
}
@keyframes twinkle {
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>
<div class="star-3 stars"></div>
Solution
<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-duration: 1s;
animation-name: twinkle;
}
.star-2 {
margin-top: 25%;
margin-left: 25%;
animation-duration: 0.9s;
animation-name: twinkle;
}
.star-3 {
margin-top: 10%;
margin-left: 50%;
animation-duration: 1.1s;
animation-name: twinkle;
}
@keyframes twinkle {
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>
<div class="star-3 stars"></div>