182 lines
3.6 KiB
Markdown
182 lines
3.6 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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forumTopicId: 301062
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dashedName: make-a-css-heartbeat-using-an-infinite-animation-count
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---
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# --description--
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Here's one more continuous animation example with the `animation-iteration-count` 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 `heart` elements (including the `:before` and `:after` pieces) are animated to change size using the `transform` property, and the background `div` is animated to change its color using the `background` property.
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# --instructions--
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Keep the heart beating by adding the `animation-iteration-count` property for both the `back` class and the `heart` class and setting the value to `infinite`. The `heart:before` and `heart:after` selectors do not need any animation properties.
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# --hints--
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The `animation-iteration-count` property for the `heart` class should have a value of `infinite`.
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```js
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assert($('.heart').css('animation-iteration-count') == 'infinite');
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```
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The `animation-iteration-count` property for the `back` class should have a value of `infinite`.
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```js
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assert($('.back').css('animation-iteration-count') == 'infinite');
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```
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# --seed--
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## --seed-contents--
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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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# --solutions--
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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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animation-iteration-count: infinite;
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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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animation-iteration-count: infinite;
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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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