123 lines
3.0 KiB
Markdown
123 lines
3.0 KiB
Markdown
---
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id: 587d78a8367417b2b2512ae4
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title: Make a CSS Heartbeat using an Infinite Animation Count
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challengeType: 0
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videoUrl: 'https://scrimba.com/c/cDZpDUr'
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---
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## Description
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<section id='description'>
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Here's one more continuous animation example with the <code>animation-iteration-count</code> property that uses the heart you designed in a previous challenge.
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The one-second long heartbeat animation consists of two animated pieces. The <code>heart</code> elements (including the <code>:before</code> and <code>:after</code> pieces) are animated to change size using the <code>transform</code> property, and the background <code>div</code> is animated to change its color using the <code>background</code> property.
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</section>
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## Instructions
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<section id='instructions'>
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Keep the heart beating by adding the <code>animation-iteration-count</code> property for both the <code>back</code> class and the <code>heart</code> class and setting the value to infinite. The <code>heart:before</code> and <code>heart:after</code> selectors do not need any animation properties.
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: The <code>animation-iteration-count</code> property for the <code>heart</code> class should have a value of infinite.
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testString: 'assert($(".heart").css("animation-iteration-count") == "infinite", "The <code>animation-iteration-count</code> property for the <code>heart</code> class should have a value of infinite.");'
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- text: The <code>animation-iteration-count</code> property for the <code>back</code> class should have a value of infinite.
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testString: 'assert($(".back").css("animation-iteration-count") == "infinite", "The <code>animation-iteration-count</code> property for the <code>back</code> class should have a value of infinite.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='html-seed'>
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```html
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<style>
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.back {
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position: fixed;
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padding: 0;
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margin: 0;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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background: white;
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animation-name: backdiv;
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animation-duration: 1s;
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}
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.heart {
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position: absolute;
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margin: auto;
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top: 0;
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right: 0;
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bottom: 0;
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left: 0;
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background-color: pink;
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height: 50px;
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width: 50px;
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transform: rotate(-45deg);
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animation-name: beat;
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animation-duration: 1s;
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}
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.heart:after {
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background-color: pink;
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content: "";
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border-radius: 50%;
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position: absolute;
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width: 50px;
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height: 50px;
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top: 0px;
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left: 25px;
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}
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.heart:before {
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background-color: pink;
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content: "";
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border-radius: 50%;
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position: absolute;
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width: 50px;
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height: 50px;
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top: -25px;
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left: 0px;
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}
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@keyframes backdiv {
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50% {
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background: #ffe6f2;
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}
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}
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@keyframes beat {
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0% {
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transform: scale(1) rotate(-45deg);
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}
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50% {
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transform: scale(0.6) rotate(-45deg);
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}
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}
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</style>
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<div class="back"></div>
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<div class="heart"></div>
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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