Exemple d'élément de chargement animé CSS

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14 October 2023

```html
<!DOCTYPE html>
<html lang="pt-BR">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <style>
    /* css_foundation */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

body {
      background: url("https://vinixodin.com/thumb.jpg") no-repeat center center;
      background-color: black;
      background-size: cover;
      display: flex;
      align-items: center;
      justify-content: center;
      height: 100vh;
      overflow: hidden;
    }

.codigo {
      position: absolute;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      background: #272822;
      color: #F8F8F2;
      font-family: 'Consolas', 'Monaco', monospace;
      font-size: 18px;
      padding: 20px;
      border-radius: 8px;
      white-space: pre-line;
      text-align: left;
      line-height: 1.6;
      max-height: 25%;
      max-width: 75%;
      width: 75%;
      height: 25%;
      top:15%;
      overflow-y: hidden;
      box-shadow: -8px 10px 18px rgba(0, 0, 0, 0.55);
    }

.selector       { color: #F92672; }
    .property       { color: #66D9EF; }
    .value-number   { color: #AE81FF; }
    .value-string   { color: #E6DB74; }
    .value-color    { color: #A6E22E; }
    .function       { color: #A6E22E; }

.animation-container {
      position: absolute;
      top: 75%;
      left: 50%;
      transform: translate(-50%, -50%);
      display: flex;
      align-items: center;
      justify-content: center;
      width: 100%;
      height: 50%;
      overflow: hidden;
      background: transparent;
      aspect-ratio: 9/16;
      min-height: 100vh;
    }

.fractura {
      position: relative;
      width: 100%;
      height: 100%;
      z-index: 1;
    }

.fractura::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: #fff;
      transform: rotate(45deg);
      z-index: 2;
    }

.fractura::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: #fff;
      transform: rotate(-45deg);
      z-index: 3;
    }

.linha {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 50%;
      height: 50%;
      background: #fff;
      transform-origin: left;
      animation: animar-linha 2s linear infinite;
    }

.linha::before, .linha::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: #fff;
    }

.linha::before {
      transform: rotate(45deg);
    }

.linha::after {
      transform: rotate(-45deg);
      animation: animar-linha-after 2s linear infinite;
    }

.fragmento {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 50%;
      height: 50%;
      background: #fff;
      transform-origin: left;
      animation: animar-fragmento 2s linear infinite;
    }

.fragmento::before, .fragmento::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: #fff;
    }

.fragmento::before {
      transform: rotate(45deg);
      animation: animar-fragmento-before 2s linear infinite;
    }

.fragmento::after {
      transform: rotate(-45deg);
      animation: animar-fragmento-after 2s linear infinite;
    }

@keyframes animar-linha {
      0% {
        transform: translate(-50%, -50%) rotate(0deg);
      }
      100% {
        transform: translate(-50%, -50%) rotate(180deg);
      }
    }

@keyframes animar-linha-after {
      0% {
        transform: translate(-50%, -50%) rotate(-45deg);
      }
      100% {
        transform: translate(-50%, -50%) rotate(-225deg);
      }
    }

@keyframes animar-fragmento {
      0% {
        transform: translate(-50%, -50%) rotate(0deg);
      }
      100% {
        transform: translate(-50%, -50%) rotate(360deg);
      }
    }

@keyframes animar-fragmento-before {
      0% {
        transform: translate(-50%, -50%) rotate(45deg);
      }
      100% {
        transform: translate(-50%, -50%) rotate(405deg);
      }
    }

@keyframes animar-fragmento-after {
      0% {
        transform: translate(-50%, -50%) rotate(-45deg);
      }
      100% {
        transform: translate(-50%, -50%) rotate(-405deg);
      }
    }

/* Ação para a segunda exibição */
    .animation-container.second-iteration {
      transform: translateX(-50%) translateY(-50%) rotate(30deg);
    }

.linia-second-iteration {
      animation: animar-linha-second-iteration 2s linear infinite;
    }

@keyframes animar-linha-second-iteration {
      0% {
        transform: translate(-50%, -50%) rotate(0deg);
      }
      100% {
        transform: translate(-50%, -50%) rotate(360deg);
      }
    }

.fragment-second-iteration {
      animation: animar-fragment-second-iteration 2s linear infinite;
    }

@keyframes animar-fragment-second-iteration {
      0% {
        transform: translate(-50%, -50%) rotate(0deg);
      }
      100% {
        transform: translate(-50%, -50%) rotate(360deg);
      }
    }

/* Código Exemplo */
    .loading-element {
      border-radius: 50%;
      animation: loading-animation 1s linear infinite;
    }

@keyframes loading-animation {
      0% {
        transform: rotate(0deg);
      }
      100% {
        transform: rotate(360deg);
      }
    }
  </style>
</head>
<body>

<div class="animation-container second-iteration">
    <div class="fractura">
      <div class="linha"></div>
      <div class="linha" style="animation-delay: 0.5s;"></div>
      <div class="linha"></div>
      <div class="fragmento"></div>
      <div class="fragmento" style="animation-delay: 1s;"></div>
      <div class="linha linia-second-iteration"></div>
      <div class="fragmento fragment-second-iteration"></div>
    </div>
  </div>
</body>
</html>
```

CSS

/* 
  Base foundation
*/
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background:url("./thumb.jpg") no-repeat center center;
  background-color: black;
  background-size: cover;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  overflow: hidden;
  aspect-ratio: 9/16;
}

.codigo {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  background: #272822;
  color: #F8F8F2;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 18px;
  padding: 20px;
  border-radius: 8px;
  white-space: pre-line;
  text-align: left;
  line-height: 1.6;
  max-height: 25%;
  max-width: 75%;
  width: 75%;
  height: 25%;
  top:15%;
  overflow-y: hidden;
  box-shadow: -8px 10px 18px rgba(0, 0, 0, 0.55);
}

.selector       { color: #F92672; }
.property       { color: #66D9EF; }
.value-number   { color: #AE81FF; }
.value-string   { color: #E6DB74; }
.value-color    { color: #A6E22E; }
.function       { color: #A6E22E; }

.animation-container {
  position: absolute;
  top: 75%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 50%;
  overflow: hidden;
  background: transparent;
  aspect-ratio: 9/16;
}

/* 
  Layers e motivação emocional
*/
.loading-element {
  background-color: #333333;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  animation: loading-animation 1s linear infinite;
  position: relative;
}

@keyframes loading-animation {
  0% {
    transform: scale(0);
  }
  100% {
    transform: scale(1);
  }
}

.layer1 {
  width: 100%;
  height: 100%;
  background-color: #4D4D4D;
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transition: opacity 1s;
}

.layer1::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #3F3F3F;
  width: 20px;
  height: 20px;
  border-radius: 50%;
}

/* 
  Micro-detalhes para o replay value
*/
.layer2 {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: #3F3F3F;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  animation: detalhe 2s linear infinite;
}

@keyframes detalhe {
  50% {
    transform: scale(1);
    background-color: #666666;
  }
  100% {
    transform: scale(0);
    background-color: #3F3F3F;
  }
}

/* 
  Interações entre camadas e elementos
*/
.layer3 {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: #2F2F2F;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: interacao 2s linear infinite;
}

@keyframes interacao {
  50% {
    transform: scale(1);
    background-color: #777777;
  }
  100% {
    transform: scale(0);
    background-color: #2F2F2F;
  }
}

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