CSS实例-切换开关

在线展示：

矩形开关

.switch { position: relative; display: inline-block; width: 60px; height: 34px }
.switch input { opacity: 0; width: 0; height: 0 }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: rgba(204, 204, 204, 1); -webkit-transition: .4s; transition: 0.4s }
.slider:before { position: absolute; content: ""; height: 26px; width: 26px; left: 4px; bottom: 4px; background-color: rgba(255, 255, 255, 1); -webkit-transition: .4s; transition: 0.4s }
input:checked+.slider { background-color: rgba(33, 150, 243, 1) }
input:focus+.slider { box-shadow: 0 0 1px rgba(33, 150, 243, 1) }
input:checked+.slider:before { -webkit-transform: translateX(26px); -ms-transform: translateX(26px); transform: translateX(26px) }
.slider.round { border-radius: 34px }
.slider.round:before { border-radius: 50% }

圆形开关

代码：

<!-- 矩形开关 -->
<label class="switch">
  <input type="checkbox">
  <span class="slider"></span>
</label>

<!-- 圆形开关 -->
<label class="switch">
  <input type="checkbox">
  <span class="slider round"></span>
</label>

/* switch box  */
.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

/* 隐藏默认 checkbox */
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

/* 开关 */
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
/* 过渡 */
  -webkit-transition: .4s;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}
/* 改变颜色 */
input:checked + .slider {
  background-color: #2196F3;
}

input:focus + .slider {
  box-shadow: 0 0 1px #2196F3;
}
/* 中心原点运动 */
input:checked + .slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}

/* 圆角 */
.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}