ds">
      <a href="demos/ptr.html" class="weui-grid js_grid">
        <div class="weui-grid__icon">
          <img src="demos/images/icon_nav_ptr.png" alt="">
        </div>
        <p class="weui-grid__label">
          下拉刷新
        </p>
      </a>
      <a href="demos/infinite.html" class="weui-grid js_grid">
        <div class="weui-grid__icon">
          <img src="demos/images/icon_nav_up.png" alt="">
        </div>
        <p class="weui-grid__label">
          滚动加载
        </p>
      