Dropdown 下拉菜单

将动作或菜单折叠到下拉菜单中。

基础用法

移动到下拉菜单上，展开更多操作。

Dropdown 下拉菜单 - 图1

通过组件slot来设置下拉触发的元素以及需要通过具名slot为dropdown 来设置下拉菜单。默认情况下，下拉按钮只要hover即可，无需点击也会显示下拉菜单。

  1. <el-dropdown>
  2.   <span class="el-dropdown-link">
  3.     下拉菜单<i class="el-icon-arrow-down el-icon--right"></i>
  4.   </span>
  5.   <el-dropdown-menu slot="dropdown">
  6.     <el-dropdown-item>黄金糕</el-dropdown-item>
  7.     <el-dropdown-item>狮子头</el-dropdown-item>
  8.     <el-dropdown-item>螺蛳粉</el-dropdown-item>
  9.     <el-dropdown-item disabled>双皮奶</el-dropdown-item>
  10.     <el-dropdown-item divided>蚵仔煎</el-dropdown-item>
  11.   </el-dropdown-menu>
  12. </el-dropdown>

触发对象

可使用按钮触发下拉菜单。

Dropdown 下拉菜单 - 图2

设置split-button属性来让触发下拉元素呈现为按钮组，左边是功能按钮，右边是触发下拉菜单的按钮，设置为true即可。

  1. <el-dropdown>
  2.   <el-button type="primary">
  3.     更多菜单<i class="el-icon-arrow-down el-icon--right"></i>
  4.   </el-button>
  5.   <el-dropdown-menu slot="dropdown">
  6.     <el-dropdown-item>黄金糕</el-dropdown-item>
  7.     <el-dropdown-item>狮子头</el-dropdown-item>
  8.     <el-dropdown-item>螺蛳粉</el-dropdown-item>
  9.     <el-dropdown-item>双皮奶</el-dropdown-item>
  10.     <el-dropdown-item>蚵仔煎</el-dropdown-item>
  11.   </el-dropdown-menu>
  12. </el-dropdown>
  13. <el-dropdown split-button type="primary" @click="handleClick">
  14.   更多菜单
  15.   <el-dropdown-menu slot="dropdown">
  16.     <el-dropdown-item>黄金糕</el-dropdown-item>
  17.     <el-dropdown-item>狮子头</el-dropdown-item>
  18.     <el-dropdown-item>螺蛳粉</el-dropdown-item>
  19.     <el-dropdown-item>双皮奶</el-dropdown-item>
  20.     <el-dropdown-item>蚵仔煎</el-dropdown-item>
  21.   </el-dropdown-menu>
  22. </el-dropdown>
  24. <style>
  25.   .el-dropdown {
  26.     vertical-align: top;
  27.   }
  28.   .el-dropdown + .el-dropdown {
  29.     margin-left: 15px;
  30.   }
  31.   .el-icon-arrow-down {
  32.     font-size: 12px;
  33.   }
  34. </style>
  36. <script>
  37.   export default {
  38.     methods: {
  39.       handleClick() {
  40.         alert('button click');
  41.       }
  42.     }
  43.   }
  44. </script>

显示代码

触发方式

可以配置 click 激活或者 hover 激活。

在trigger属性设置为click即可。

  1. <el-row class="block-col-2">
  2.   <el-col :span="12">
  3.     <span class="demonstration">hover 激活</span>
  4.     <el-dropdown>
  5.       <span class="el-dropdown-link">
  6.         下拉菜单<i class="el-icon-arrow-down el-icon--right"></i>
  7.       </span>
  8.       <el-dropdown-menu slot="dropdown">
  9.         <el-dropdown-item>黄金糕</el-dropdown-item>
  10.         <el-dropdown-item>狮子头</el-dropdown-item>
  11.         <el-dropdown-item>螺蛳粉</el-dropdown-item>
  12.         <el-dropdown-item>双皮奶</el-dropdown-item>
  13.         <el-dropdown-item>蚵仔煎</el-dropdown-item>
  14.       </el-dropdown-menu>
  15.     </el-dropdown>
  16.   </el-col>
  17.   <el-col :span="12">
  18.     <span class="demonstration">click 激活</span>
  19.     <el-dropdown trigger="click">
  20.       <span class="el-dropdown-link">
  21.         下拉菜单<i class="el-icon-arrow-down el-icon--right"></i>
  22.       </span>
  23.       <el-dropdown-menu slot="dropdown">
  24.         <el-dropdown-item>黄金糕</el-dropdown-item>
  25.         <el-dropdown-item>狮子头</el-dropdown-item>
  26.         <el-dropdown-item>螺蛳粉</el-dropdown-item>
  27.         <el-dropdown-item>双皮奶</el-dropdown-item>
  28.         <el-dropdown-item>蚵仔煎</el-dropdown-item>
  29.       </el-dropdown-menu>
  30.     </el-dropdown>
  31.   </el-col>
  32. </el-row>

菜单隐藏方式

可以hide-on-click属性来配置。

Dropdown 下拉菜单 - 图3

下拉菜单默认在点击菜单项后会被隐藏，将hide-on-click属性默认为false可以关闭此功能。

  1. <el-dropdown :hide-on-click="false">
  2.   <span class="el-dropdown-link">
  3.     下拉菜单<i class="el-icon-arrow-down el-icon--right"></i>
  4.   </span>
  5.   <el-dropdown-menu slot="dropdown">
  6.     <el-dropdown-item>黄金糕</el-dropdown-item>
  7.     <el-dropdown-item>狮子头</el-dropdown-item>
  8.     <el-dropdown-item>螺蛳粉</el-dropdown-item>
  9.     <el-dropdown-item disabled>双皮奶</el-dropdown-item>
  10.     <el-dropdown-item divided>蚵仔煎</el-dropdown-item>
  11.   </el-dropdown-menu>
  12. </el-dropdown>
  14. <style>
  15.   .el-dropdown-link {
  16.     cursor: pointer;
  17.     color: #409EFF;
  18.   }
  19.   .el-icon-arrow-down {
  20.     font-size: 12px;
  21.   }
  22. </style>

指令事件

点击菜单项后会触发事件，用户可以通过相应的菜单项 key 进行不同的操作

Dropdown 下拉菜单 - 图4

  1. <el-dropdown @command="handleCommand">
  2.   <span class="el-dropdown-link">
  3.     下拉菜单<i class="el-icon-arrow-down el-icon--right"></i>
  4.   </span>
  5.   <el-dropdown-menu slot="dropdown">
  6.     <el-dropdown-item command="a">黄金糕</el-dropdown-item>
  7.     <el-dropdown-item command="b">狮子头</el-dropdown-item>
  8.     <el-dropdown-item command="c">螺蛳粉</el-dropdown-item>
  9.     <el-dropdown-item command="d" disabled>双皮奶</el-dropdown-item>
  10.     <el-dropdown-item command="e" divided>蚵仔煎</el-dropdown-item>
  11.   </el-dropdown-menu>
  12. </el-dropdown>
  14. <style>
  15.   .el-dropdown-link {
  16.     cursor: pointer;
  17.     color: #409EFF;
  18.   }
  19.   .el-icon-arrow-down {
  20.     font-size: 12px;
  21.   }
  22. </style>
  24. <script>
  25.   export default {
  26.     methods: {
  27.       handleCommand(command) {
  28.         this.$message('click on item ' + command);
  29.       }
  30.     }
  31.   }
  32. </script>

不同尺寸

Dropdown 组件提供除了默认值以外的三种尺寸，可以在不同场景下选择合适的尺寸。

Dropdown 下拉菜单 - 图5

额外的尺寸：medium、small、mini，通过设置size属性来配置它们。

  1. <el-dropdown split-button type="primary">
  2.   默认尺寸
  3.   <el-dropdown-menu slot="dropdown">
  4.     <el-dropdown-item>黄金糕</el-dropdown-item>
  5.     <el-dropdown-item>狮子头</el-dropdown-item>
  6.     <el-dropdown-item>螺蛳粉</el-dropdown-item>
  7.     <el-dropdown-item>双皮奶</el-dropdown-item>
  8.     <el-dropdown-item>蚵仔煎</el-dropdown-item>
  9.   </el-dropdown-menu>
  10. </el-dropdown>
  12. <el-dropdown size="medium" split-button type="primary">
  13.   中等尺寸
  14.   <el-dropdown-menu slot="dropdown">
  15.     <el-dropdown-item>黄金糕</el-dropdown-item>
  16.     <el-dropdown-item>狮子头</el-dropdown-item>
  17.     <el-dropdown-item>螺蛳粉</el-dropdown-item>
  18.     <el-dropdown-item>双皮奶</el-dropdown-item>
  19.     <el-dropdown-item>蚵仔煎</el-dropdown-item>
  20.   </el-dropdown-menu>
  21. </el-dropdown>
  23. <el-dropdown size="small" split-button type="primary">
  24.   小型尺寸
  25.   <el-dropdown-menu slot="dropdown">
  26.     <el-dropdown-item>黄金糕</el-dropdown-item>
  27.     <el-dropdown-item>狮子头</el-dropdown-item>
  28.     <el-dropdown-item>螺蛳粉</el-dropdown-item>
  29.     <el-dropdown-item>双皮奶</el-dropdown-item>
  30.     <el-dropdown-item>蚵仔煎</el-dropdown-item>
  31.   </el-dropdown-menu>
  32. </el-dropdown>
  34. <el-dropdown size="mini" split-button type="primary">
  35.   超小尺寸
  36.   <el-dropdown-menu slot="dropdown">
  37.     <el-dropdown-item>黄金糕</el-dropdown-item>
  38.     <el-dropdown-item>狮子头</el-dropdown-item>
  39.     <el-dropdown-item>螺蛳粉</el-dropdown-item>
  40.     <el-dropdown-item>双皮奶</el-dropdown-item>
  41.     <el-dropdown-item>蚵仔煎</el-dropdown-item>
  42.   </el-dropdown-menu>
  43. </el-dropdown>

Dropdown Attributes

参数 说明 类型 可选值 默认值
type 菜单按钮类型，同 Button 组件(只在split-button为 true 的情况下有效) string — —
size 菜单尺寸，在split-button为 true 的情况下也对触发按钮生效 string medium / small / mini —
split-button 下拉触发元素呈现为按钮组 boolean — false
placement 菜单弹出位置 string top/top-start/top-end/bottom/bottom-start/bottom-end bottom-end
trigger 触发下拉的行为 string hover, click hover
hide-on-click 是否在点击菜单项后隐藏菜单 boolean — true
show-timeout 展开下拉菜单的延时（仅在 trigger 为 hover 时有效） number — 250
hide-timeout 收起下拉菜单的延时（仅在 trigger 为 hover 时有效） number — 150

Dropdown Events

事件名称 说明 回调参数
click split-button 为 true 时，点击左侧按钮的回调 —
command 点击菜单项触发的事件回调 dropdown-item 的指令
visible-change 下拉框出现/隐藏时触发 出现则为 true，隐藏则为 false

Dropdown Menu Item Attributes

参数 说明 类型 可选值 默认值
command 指令 string/number/object — —
disabled 禁用 boolean — false
divided 显示分割线 boolean — false

原文: http://element-cn.eleme.io/#/zh-CN/component/dropdown