vue3.0 ElementPlus 中文版入门教程 ElementPlus Dropdown 下拉菜单

2024-02-25 开发教程 vue3.0 ElementPlus 中文版入门教程匿名 4℃

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。

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。

<template>
  <el-dropdown>
  <span class="el-dropdown-link">
    下拉菜单<i class="el-icon-arrow-down el-icon--right"></i>
  </span>
  <template #dropdown>
    <el-dropdown-menu>
      <el-dropdown-item>黄金糕</el-dropdown-item>
      <el-dropdown-item>狮子头</el-dropdown-item>
      <el-dropdown-item>螺蛳粉</el-dropdown-item>
      <el-dropdown-item disabled>双皮奶</el-dropdown-item>
      <el-dropdown-item divided>蚵仔煎</el-dropdown-item>
    </el-dropdown-menu>
  </template>
</el-dropdown>
</template>
<style>
  .el-dropdown-link {
    cursor: pointer;
    color: #409eff;
  }
  .el-icon-arrow-down {
    font-size: 12px;
  }
</style>

触发对象

可使用按钮触发下拉菜单。

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。

<template>
  <el-dropdown>
  <el-button type="primary">
    更多菜单<i class="el-icon-arrow-down el-icon--right"></i>
  </el-button>
  <template #dropdown>
    <el-dropdown-menu>
      <el-dropdown-item>黄金糕</el-dropdown-item>
      <el-dropdown-item>狮子头</el-dropdown-item>
      <el-dropdown-item>螺蛳粉</el-dropdown-item>
      <el-dropdown-item>双皮奶</el-dropdown-item>
      <el-dropdown-item>蚵仔煎</el-dropdown-item>
    </el-dropdown-menu>
  </template>
</el-dropdown>
<el-dropdown split-button type="primary" @click="handleClick">
  更多菜单
  <template #dropdown>
    <el-dropdown-menu>
      <el-dropdown-item>黄金糕</el-dropdown-item>
      <el-dropdown-item>狮子头</el-dropdown-item>
      <el-dropdown-item>螺蛳粉</el-dropdown-item>
      <el-dropdown-item>双皮奶</el-dropdown-item>
      <el-dropdown-item>蚵仔煎</el-dropdown-item>
    </el-dropdown-menu>
  </template>
</el-dropdown>
</template>
<script>
  export default {
    methods: {
      handleClick() {
        alert('button click')
      },
    },
  }
</script>
<style>
  .el-dropdown {
    vertical-align: top;
  }
  .el-dropdown + .el-dropdown {
    margin-left: 15px;
  }
  .el-icon-arrow-down {
    font-size: 12px;
  }
</style>

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。

<template>
  <el-row class="block-col-2">
  <el-col :span="8">
    <span class="demonstration">hover 激活</span>
    <el-dropdown>
      <span class="el-dropdown-link">
        下拉菜单<i class="el-icon-arrow-down el-icon--right"></i>
      </span>
      <template #dropdown>
        <el-dropdown-menu>
          <el-dropdown-item icon="el-icon-plus">黄金糕</el-dropdown-item>
          <el-dropdown-item icon="el-icon-circle-plus">狮子头</el-dropdown-item>
          <el-dropdown-item icon="el-icon-circle-plus-outline"
            >螺蛳粉</el-dropdown-item
          >
          <el-dropdown-item icon="el-icon-check">双皮奶</el-dropdown-item>
          <el-dropdown-item icon="el-icon-circle-check"
            >蚵仔煎</el-dropdown-item
          >
        </el-dropdown-menu>
      </template>
    </el-dropdown>
  </el-col>
  <el-col :span="8">
    <span class="demonstration">click 激活</span>
    <el-dropdown trigger="click">
      <span class="el-dropdown-link">
        下拉菜单<i class="el-icon-arrow-down el-icon--right"></i>
      </span>
      <template #dropdown>
        <el-dropdown-menu>
          <el-dropdown-item icon="el-icon-plus">黄金糕</el-dropdown-item>
          <el-dropdown-item icon="el-icon-circle-plus">狮子头</el-dropdown-item>
          <el-dropdown-item icon="el-icon-circle-plus-outline"
            >螺蛳粉</el-dropdown-item
          >
          <el-dropdown-item icon="el-icon-check">双皮奶</el-dropdown-item>
          <el-dropdown-item icon="el-icon-circle-check"
            >蚵仔煎</el-dropdown-item
          >
        </el-dropdown-menu>
      </template>
    </el-dropdown>
  </el-col>
  <el-col :span="8">
    <span class="demonstration">右键(contextmenu) 激活</span>
    <el-dropdown trigger="contextmenu">
      <span class="el-dropdown-link">
        下拉菜单<i class="el-icon-arrow-down el-icon--right"></i>
      </span>
      <template #dropdown>
        <el-dropdown-menu>
          <el-dropdown-item icon="el-icon-plus">黄金糕</el-dropdown-item>
          <el-dropdown-item icon="el-icon-circle-plus">狮子头</el-dropdown-item>
          <el-dropdown-item icon="el-icon-circle-plus-outline"
            >螺蛳粉</el-dropdown-item
          >
          <el-dropdown-item icon="el-icon-check">双皮奶</el-dropdown-item>
          <el-dropdown-item icon="el-icon-circle-check"
            >蚵仔煎</el-dropdown-item
          >
        </el-dropdown-menu>
      </template>
    </el-dropdown>
  </el-col>
</el-row>
</template>
<style>
  .el-dropdown-link {
    cursor: pointer;
    color: #409eff;
  }
  .el-icon-arrow-down {
    font-size: 12px;
  }
  .demonstration {
    display: block;
    color: var(--el-text-color-secondary);
    font-size: 14px;
    margin-bottom: 20px;
  }
</style>

菜单隐藏方式

可以hide-on-click属性来配置。

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。

<template>
  <el-dropdown :hide-on-click="false">
  <span class="el-dropdown-link">
    下拉菜单<i class="el-icon-arrow-down el-icon--right"></i>
  </span>
  <template #dropdown>
    <el-dropdown-menu>
      <el-dropdown-item>黄金糕</el-dropdown-item>
      <el-dropdown-item>狮子头</el-dropdown-item>
      <el-dropdown-item>螺蛳粉</el-dropdown-item>
      <el-dropdown-item disabled>双皮奶</el-dropdown-item>
      <el-dropdown-item divided>蚵仔煎</el-dropdown-item>
    </el-dropdown-menu>
  </template>
</el-dropdown>
</template>
<style>
  .el-dropdown-link {
    cursor: pointer;
    color: #409eff;
  }
  .el-icon-arrow-down {
    font-size: 12px;
  }
</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

<template>
  <el-dropdown @command="handleCommand">
  <span class="el-dropdown-link">
    下拉菜单<i class="el-icon-arrow-down el-icon--right"></i>
  </span>
  <template #dropdown>
    <el-dropdown-menu>
      <el-dropdown-item command="a">黄金糕</el-dropdown-item>
      <el-dropdown-item command="b">狮子头</el-dropdown-item>
      <el-dropdown-item command="c">螺蛳粉</el-dropdown-item>
      <el-dropdown-item command="d" disabled>双皮奶</el-dropdown-item>
      <el-dropdown-item command="e" divided>蚵仔煎</el-dropdown-item>
    </el-dropdown-menu>
  </template>
</el-dropdown>
</template>
<script>
  export default {
    methods: {
      handleCommand(command) {
        this.$message('click on item ' + command)
      },
    },
  }
</script>
<style>
  .el-dropdown-link {
    cursor: pointer;
    color: #409eff;
  }
  .el-icon-arrow-down {
    font-size: 12px;
  }
</style>

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。

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

<template>
  <el-dropdown split-button type="primary">
  默认尺寸
  <template #dropdown>
    <el-dropdown-menu>
      <el-dropdown-item>黄金糕</el-dropdown-item>
      <el-dropdown-item>狮子头</el-dropdown-item>
      <el-dropdown-item>螺蛳粉</el-dropdown-item>
      <el-dropdown-item>双皮奶</el-dropdown-item>
      <el-dropdown-item>蚵仔煎</el-dropdown-item>
    </el-dropdown-menu>
  </template>
</el-dropdown>
<el-dropdown size="medium" split-button type="primary">
  中等尺寸
  <template #dropdown>
    <el-dropdown-menu>
      <el-dropdown-item>黄金糕</el-dropdown-item>
      <el-dropdown-item>狮子头</el-dropdown-item>
      <el-dropdown-item>螺蛳粉</el-dropdown-item>
      <el-dropdown-item>双皮奶</el-dropdown-item>
      <el-dropdown-item>蚵仔煎</el-dropdown-item>
    </el-dropdown-menu>
  </template>
</el-dropdown>
<el-dropdown size="small" split-button type="primary">
  小型尺寸
  <template #dropdown>
    <el-dropdown-menu>
      <el-dropdown-item>黄金糕</el-dropdown-item>
      <el-dropdown-item>狮子头</el-dropdown-item>
      <el-dropdown-item>螺蛳粉</el-dropdown-item>
      <el-dropdown-item>双皮奶</el-dropdown-item>
      <el-dropdown-item>蚵仔煎</el-dropdown-item>
    </el-dropdown-menu>
  </template>
</el-dropdown>
<el-dropdown size="mini" split-button type="primary">
  超小尺寸
  <template #dropdown>
    <el-dropdown-menu>
      <el-dropdown-item>黄金糕</el-dropdown-item>
      <el-dropdown-item>狮子头</el-dropdown-item>
      <el-dropdown-item>螺蛳粉</el-dropdown-item>
      <el-dropdown-item>双皮奶</el-dropdown-item>
      <el-dropdown-item>蚵仔煎</el-dropdown-item>
    </el-dropdown-menu>
  </template>
</el-dropdown>
</template>

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	—
max-height	菜单最大高度	string / number	—	—
split-button	下拉触发元素呈现为按钮组	boolean	—	false
disabled	是否禁用	boolean	—	false
placement	菜单弹出位置	string	top/top-start/top-end/bottom/bottom-start/bottom-end	bottom
trigger	触发下拉的行为	string	hover, click, contextmenu	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
tabindex	Dropdown 组件的 tabindex	number	—	0

Dropdown Slots

Name	说明
—	触发下拉列表显示的元素。注意：必须是一个元素或者或者组件
dropdown	下拉列表，通常是 `<el-dropdown-menu>`组件

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

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
icon	图标类名	string	—	—

上一节： ElementPlus PageHeader 页头

下一节： ElementPlus Steps 步骤条

"vue3.0 ElementPlus 中文版入门教程"的目录