用纯css写5个loading动画

1. 旋转圆圈

HTML:

<div class="spinner"></div>

CSS:

.spinner {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 5px solid #ccc;
  border-top-color: #333;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

2. 线性加载条

HTML:

<div class="progress-bar"></div>

CSS:

.progress-bar {
  width: 100%;
  height: 10px;
  background-color: #ccc;
  position: relative;
}

.progress-bar::before {
  content: "";
  width: 0%;
  height: 100%;
  background-color: #333;
  position: absolute;
  top: 0;
  left: 0;
  animation: progress 2s ease-out infinite;
}

@keyframes progress {
  to {
    width: 100%;
  }
}

3. 跳动的点

HTML:

<div class="bounce-loader">
  <div></div>
  <div></div>
  <div></div>
</div>

CSS:

.bounce-loader {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 50px;
}

.bounce-loader div {
  width: 10px;
  height: 10px;
  background-color: #333;
  border-radius: 50%;
  margin: 0 5px;
  animation: bounce 2s ease-in-out infinite;
}

.bounce-loader div:nth-child(1) {
  animation-delay: 0s;
}

.bounce-loader div:nth-child(2) {
  animation-delay: 0.2s;
}

.bounce-loader div:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes bounce {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
  100% {
    transform: translateY(0);
  }
}

4. 环形加载

HTML:

<div class="circular-loader"></div>

CSS:

.circular-loader {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 5px solid #ccc;
  border-top-color: #333;
  animation: spin 1s linear infinite;
  position: relative;
}

.circular-loader::before {
  content: "";
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 5px solid #ccc;
  border-top-color: #333;
  opacity: 0.3;
  position: absolute;
  top: 0;
  left: 0;
  animation: pulse 2s ease-out infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes pulse {
  0% {
    transform: scale(0.8);
    opacity: 0.3;
  }
  50% {
    transform: scale(1);
    opacity: 0.5;
  }
  100% {
    transform: scale(0.8);
    opacity: 0.3;
  }
}

5. 方块加载

HTML:

<div class="square-loader">
  <div></div>
  <div></div>
  <div></div>
</div>

CSS:

.square-loader {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 50px;
}

.square-loader div {
  width: 10px;
  height: 10px;
  background-color: #333;
  margin: 0 5px;
  animation: square 2s ease-in-out infinite;
}

.square-loader div:nth-child(1) {
  animation-delay: 0s;
}

.square-loader div:nth-child(2) {
  animation-delay: 0.2s;
}

.square-loader div:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes square {
  0% {
    transform: translateY(0);
  }
  25% {
    transform: translateY(-20px);
  }
  50% {
    transform: translateY(0);
  }
  75% {
    transform: translateY(20px);
  }
  100% {
    transform: translateY(0);
  }
}