开关是用于二进制状态（如开/关）的特殊复选框

关 开

关 开

  <!-- Switch -->
  <div class="switch">
    <label>
      Off
      <input type="checkbox">
      <span class="lever"></span>
      On
    </label>
  </div>

  <!-- Disabled Switch -->
  <div class="switch">
    <label>
      Off
      <input disabled type="checkbox">
      <span class="lever"></span>
      On
    </label>
  </div>