182 lines
		
	
	
		
			3.7 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			182 lines
		
	
	
		
			3.7 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
---
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id: 587d78a8367417b2b2512ae4
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title: Haz latir un corazón con CSS usando un recuento de animación infinita
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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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Aquí hay un ejemplo más de animación con la propiedad `animation-iteration-count` que usa el corazón que diseñaste en un desafío anterior.
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La animación del latido de un segundo consta de dos piezas animadas. Los elementos `heart` (incluyendo las piezas `:before` y `:after`) se animan para cambiar el tamaño usando la propiedad `transform`, y el fondo `div` se anima para cambiar su color usando la propiedad `background`.
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# --instructions--
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Mantén el corazón latiendo agregando la propiedad `animation-iteration-count` tanto para la clase `back` como para la clase `heart` y estableciendo el valor en `infinite`. Los selectores `heart:before` y `heart:after` no necesitan ninguna propiedad de animación.
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# --hints--
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La propiedad `animation-iteration-count` para la clase `heart` debe tener un valor de `infinite`.
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```js
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assert($('.heart').css('animation-iteration-count') == 'infinite');
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```
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La propiedad `animation-iteration-count` para la clase `back` debe tener un valor de `infinite`.
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```js
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assert($('.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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