vue之下拉菜單Dropdown的使用

通過組件slot來設置下拉觸發的元素以及需要通過具名slot為dropdown 來設置下拉菜單。默認情況下，下拉按鈕只要hover即可，無需點擊也會顯示下拉菜單。

<el-dropdown>
  <span class="el-dropdown-link">
    下拉菜單<i class="el-icon-arrow-down el-icon--right"></i>
  </span>
  <el-dropdown-menu slot="dropdown">
    <el-dropdown-item>黃金糕</el-dropdown-item>
    <el-dropdown-item>獅子頭</el-dropdown-item>
    <el-dropdown-item>螺螄粉</el-dropdown-item>
    <el-dropdown-item disabled>雙皮奶</el-dropdown-item>
    <el-dropdown-item divided>蚵仔煎</el-dropdown-item>
  </el-dropdown-menu>
</el-dropdown>

可以配置 click 激活或者 hover 激活。

<el-dropdown trigger="click">
      <span class="el-dropdown-link">
        下拉菜單<i class="el-icon-arrow-down el-icon--right"></i>
      </span>
      <el-dropdown-menu slot="dropdown">
        <el-dropdown-item icon="el-icon-plus">黃金糕</el-dropdown-item>
        <el-dropdown-item icon="el-icon-circle-plus">獅子頭</el-dropdown-item>
        <el-dropdown-item icon="el-icon-circle-plus-outline">螺螄粉</el-dropdown-item>
        <el-dropdown-item icon="el-icon-check">雙皮奶</el-dropdown-item>
        <el-dropdown-item icon="el-icon-circle-check">蚵仔煎</el-dropdown-item>
      </el-dropdown-menu>
    </el-dropdown>

本項目中使用el-dropdown：

<el-dropdown class="avatar-container" trigger="click">
      <div class="avatar-wrapper">
        <i class="el-icon-user-solid" style="font-weight: 600"/>
        歡迎您 {{ chinaName }}
        <i class="el-icon-caret-bottom"/>
      </div>
      <el-dropdown-menu slot="dropdown" class="user-dropdown">
        <router-link class="inlineBlock" to="/">
          <el-dropdown-item>
            首頁
          </el-dropdown-item>
        </router-link>
        <el-dropdown-item divided>
          <span style="display:block;" @click="logout">退出</span>
        </el-dropdown-item>
      </el-dropdown-menu>
    </el-dropdown>

divided:顯示分割線。