当前位置：首页 > CSS

css如何制作加载

2026-04-01 16:45:12CSS

使用纯CSS制作加载动画

通过CSS的@keyframes和animation属性可以创建平滑的加载动画效果。以下是几种常见的实现方式：

旋转加载动画

css如何制作加载

.loader {
  width: 50px;
  height: 50px;
  border: 5px solid #f3f3f3;
  border-top: 5px solid #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

点状加载动画

.dot-loader {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.dot-loader div {
  width: 12px;
  height: 12px;
  background-color: #3498db;
  border-radius: 50%;
  animation: bounce 1.4s infinite ease-in-out;
}

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

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

@keyframes bounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}

使用CSS伪元素增强效果

可以通过:before和:after伪元素创建更复杂的加载动画：

css如何制作加载

.double-spinner {
  position: relative;
  width: 40px;
  height: 40px;
}

.double-spinner:before,
.double-spinner:after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  opacity: 0.6;
}

.double-spinner:before {
  background-color: #3498db;
  animation: scaleout 2s infinite ease-in-out;
}

.double-spinner:after {
  background-color: #e74c3c;
  animation: scaleout 2s infinite ease-in-out 1s;
}

@keyframes scaleout {
  0% { transform: scale(0); }
  100% { transform: scale(1); opacity: 0; }
}

进度条式加载动画

线性进度条适合显示加载进度：

.progress-bar {
  width: 100%;
  height: 4px;
  background-color: #f3f3f3;
  position: relative;
  overflow: hidden;
}

.progress-bar:after {
  content: "";
  position: absolute;
  height: 100%;
  width: 30%;
  background-color: #2ecc71;
  animation: progress 2s linear infinite;
}

@keyframes progress {
  0% { left: -30%; }
  100% { left: 100%; }
}

响应式加载动画设计

为确保加载动画在不同设备上表现良好，可以添加响应式设计：

@media (max-width: 768px) {
  .loader {
    width: 30px;
    height: 30px;
    border-width: 3px;
  }

  .dot-loader div {
    width: 8px;
    height: 8px;
  }
}