主题切换按钮

效果展示

<div class="switch-theme-container">
  <label class="switch-theme">
    <input type="checkbox" />
    <span class="slider"></span>
  </label>
</div>

.switch-theme-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 12px;
}

.switch-theme {
  font-size: 17px;
  position: relative;
  display: inline-block;
  width: 3.5em;
  height: 2em;
}

.switch-theme input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #1b1b1f;
  transition: 0.5s;
  border-radius: 30px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 1.4em;
  width: 1.4em;
  border-radius: 50%;
  left: 10%;
  bottom: 15%;
  box-shadow: inset 8px -4px 0px 0px #fff000;
  background: #1b1b1f;
  transition: 0.5s;
}

input:checked + .slider {
  background-color: rgb(200, 200, 200);
}

input:checked + .slider:before {
  transform: translateX(100%);
  box-shadow: inset 15px -4px 0px 15px #fff000;
  background: rgb(200, 200, 200);
}

实现思路