Files
freeCodeCamp/curriculum/challenges/english/01-responsive-web-design/applied-visual-design/make-a-css-heartbeat-using-an-infinite-animation-count.md
Nicholas Carrigan (he/him) 427444c757 chore(learn): audit files for crowdin (#40838)
* chore(learn): audit files for crowdin

Audits the challenge text in the Responsive Web Design superblock to
account for words/phrases that should not be translated because they
refer to code.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

* fix: remove quotes from code

Removes instances of quoted code blocks, or code blocked quotes.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

* fix: additional uncaught quote-codes

Thanks Oliver :)

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>
Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

* fix: so many quotes

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix: missing punctuation

Noted in a Crowdin comment.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

* fix: remove more quotes

Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>
Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>
2021-02-01 12:56:07 -07:00

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Markdown

---
id: 587d78a8367417b2b2512ae4
title: Make a CSS Heartbeat using an Infinite Animation Count
challengeType: 0
videoUrl: 'https://scrimba.com/c/cDZpDUr'
forumTopicId: 301062
dashedName: make-a-css-heartbeat-using-an-infinite-animation-count
---
# --description--
Here's one more continuous animation example with the `animation-iteration-count` property that uses the heart you designed in a previous challenge.
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.
# --instructions--
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.
# --hints--
The `animation-iteration-count` property for the `heart` class should have a value of `infinite`.
```js
assert($('.heart').css('animation-iteration-count') == 'infinite');
```
The `animation-iteration-count` property for the `back` class should have a value of `infinite`.
```js
assert($('.back').css('animation-iteration-count') == 'infinite');
```
# --seed--
## --seed-contents--
```html
<style>
.back {
position: fixed;
padding: 0;
margin: 0;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: white;
animation-name: backdiv;
animation-duration: 1s;
}
.heart {
position: absolute;
margin: auto;
top: 0;
right: 0;
bottom: 0;
left: 0;
background-color: pink;
height: 50px;
width: 50px;
transform: rotate(-45deg);
animation-name: beat;
animation-duration: 1s;
}
.heart:after {
background-color: pink;
content: "";
border-radius: 50%;
position: absolute;
width: 50px;
height: 50px;
top: 0px;
left: 25px;
}
.heart:before {
background-color: pink;
content: "";
border-radius: 50%;
position: absolute;
width: 50px;
height: 50px;
top: -25px;
left: 0px;
}
@keyframes backdiv {
50% {
background: #ffe6f2;
}
}
@keyframes beat {
0% {
transform: scale(1) rotate(-45deg);
}
50% {
transform: scale(0.6) rotate(-45deg);
}
}
</style>
<div class="back"></div>
<div class="heart"></div>
```
# --solutions--
```html
<style>
.back {
position: fixed;
padding: 0;
margin: 0;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: white;
animation-name: backdiv;
animation-duration: 1s;
animation-iteration-count: infinite;
}
.heart {
position: absolute;
margin: auto;
top: 0;
right: 0;
bottom: 0;
left: 0;
background-color: pink;
height: 50px;
width: 50px;
transform: rotate(-45deg);
animation-name: beat;
animation-duration: 1s;
animation-iteration-count: infinite;
}
.heart:after {
background-color: pink;
content: "";
border-radius: 50%;
position: absolute;
width: 50px;
height: 50px;
top: 0px;
left: 25px;
}
.heart:before {
background-color: pink;
content: "";
border-radius: 50%;
position: absolute;
width: 50px;
height: 50px;
top: -25px;
left: 0px;
}
@keyframes backdiv {
50% {
background: #ffe6f2;
}
}
@keyframes beat {
0% {
transform: scale(1) rotate(-45deg);
}
50% {
transform: scale(0.6) rotate(-45deg);
}
}
</style>
<div class="back"></div>
<div class="heart"></div>
```