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element-ui/examples/docs/en-US/dropdown.md
Ivan c3c9fee2fb first
2021-06-07 11:56:04 +08:00

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Dropdown

Toggleable menu for displaying lists of links and actions.

Basic usage

Hover on the dropdown menu to unfold it for more actions.

:::demo The triggering element is rendered by the default slot, and the dropdown part is rendered by the slot named dropdown. By default, dropdown list shows when you hover on the triggering element without having to click it.

<el-dropdown>
  <span class="el-dropdown-link">
    Dropdown List<i class="el-icon-arrow-down el-icon--right"></i>
  </span>
  <el-dropdown-menu slot="dropdown">
    <el-dropdown-item>Action 1</el-dropdown-item>
    <el-dropdown-item>Action 2</el-dropdown-item>
    <el-dropdown-item>Action 3</el-dropdown-item>
    <el-dropdown-item disabled>Action 4</el-dropdown-item>
    <el-dropdown-item divided>Action 5</el-dropdown-item>
  </el-dropdown-menu>
</el-dropdown>

<style>
  .el-dropdown-link {
    cursor: pointer;
    color: #409EFF;
  }
  .el-icon-arrow-down {
    font-size: 12px;
  }
</style>

:::

Triggering element

Use the button to trigger the dropdown list.

:::demo Use split-button to split the triggering element into a button group with the left button being a normal button and right one the actual triggering target. If you wanna insert a separator line between item three and item four, just add a class divider to item four.

<el-dropdown>
  <el-button type="primary">
    Dropdown List<i class="el-icon-arrow-down el-icon--right"></i>
  </el-button>
  <el-dropdown-menu slot="dropdown">
    <el-dropdown-item>Action 1</el-dropdown-item>
    <el-dropdown-item>Action 2</el-dropdown-item>
    <el-dropdown-item>Action 3</el-dropdown-item>
    <el-dropdown-item>Action 4</el-dropdown-item>
    <el-dropdown-item>Action 5</el-dropdown-item>
  </el-dropdown-menu>
</el-dropdown>
<el-dropdown split-button type="primary" @click="handleClick">
  Dropdown List
  <el-dropdown-menu slot="dropdown">
    <el-dropdown-item>Action 1</el-dropdown-item>
    <el-dropdown-item>Action 2</el-dropdown-item>
    <el-dropdown-item>Action 3</el-dropdown-item>
    <el-dropdown-item>Action 4</el-dropdown-item>
    <el-dropdown-item>Action 5</el-dropdown-item>
  </el-dropdown-menu>
</el-dropdown>

<style>
  .el-dropdown {
    vertical-align: top;
  }
  .el-dropdown + .el-dropdown {
    margin-left: 15px;
  }
  .el-icon-arrow-down {
    font-size: 12px;
  }
</style>

<script>
  export default {
    methods: {
      handleClick() {
        alert('button click');
      }
    }
  }
</script>

:::

How to trigger

Click the triggering element or hover on it.

:::demo Use the attribute trigger. By default, it is hover.

<el-row class="block-col-2">
  <el-col :span="12">
    <span class="demonstration">hover to trigger</span>
    <el-dropdown>
      <span class="el-dropdown-link">
        Dropdown List<i class="el-icon-arrow-down el-icon--right"></i>
      </span>
      <el-dropdown-menu slot="dropdown">
        <el-dropdown-item icon="el-icon-plus">Action 1</el-dropdown-item>
        <el-dropdown-item icon="el-icon-circle-plus">Action 2</el-dropdown-item>
        <el-dropdown-item icon="el-icon-circle-plus-outline">Action 3</el-dropdown-item>
        <el-dropdown-item icon="el-icon-check">Action 4</el-dropdown-item>
        <el-dropdown-item icon="el-icon-circle-check">Action 5</el-dropdown-item>
      </el-dropdown-menu>
    </el-dropdown>
  </el-col>
  <el-col :span="12">
    <span class="demonstration">click to trigger</span>
    <el-dropdown trigger="click">
      <span class="el-dropdown-link">
        Dropdown List<i class="el-icon-arrow-down el-icon--right"></i>
      </span>
      <el-dropdown-menu slot="dropdown">
        <el-dropdown-item icon="el-icon-plus">Action 1</el-dropdown-item>
        <el-dropdown-item icon="el-icon-circle-plus">Action 2</el-dropdown-item>
        <el-dropdown-item icon="el-icon-circle-plus-outline">Action 3</el-dropdown-item>
        <el-dropdown-item icon="el-icon-check">Action 4</el-dropdown-item>
        <el-dropdown-item icon="el-icon-circle-check">Action 5</el-dropdown-item>
      </el-dropdown-menu>
    </el-dropdown>
  </el-col>
</el-row>

<style>
  .el-dropdown-link {
    cursor: pointer;
    color: #409EFF;
  }
  .el-icon-arrow-down {
    font-size: 12px;
  }
  .demonstration {
    display: block;
    color: #8492a6;
    font-size: 14px;
    margin-bottom: 20px;
  }
</style>

:::

Menu hiding behavior

Use hide-on-click to define if menu closes on clicking.

:::demo By default menu will close when you click on menu items, and it can be turned off by setting hide-on-click to false.

<el-dropdown :hide-on-click="false">
  <span class="el-dropdown-link">
    Dropdown List<i class="el-icon-arrow-down el-icon--right"></i>
  </span>
  <el-dropdown-menu slot="dropdown">
    <el-dropdown-item>Action 1</el-dropdown-item>
    <el-dropdown-item>Action 2</el-dropdown-item>
    <el-dropdown-item>Action 3</el-dropdown-item>
    <el-dropdown-item disabled>Action 4</el-dropdown-item>
    <el-dropdown-item divided>Action 5</el-dropdown-item>
  </el-dropdown-menu>
</el-dropdown>

<style>
  .el-dropdown-link {
    cursor: pointer;
    color: #409EFF;
  }
  .el-icon-arrow-down {
    font-size: 12px;
  }
</style>

:::

Command event

Clicking each dropdown item fires an event whose parameter is assigned by each item.

:::demo

<el-dropdown @command="handleCommand">
  <span class="el-dropdown-link">
    Dropdown List<i class="el-icon-arrow-down el-icon--right"></i>
  </span>
  <el-dropdown-menu slot="dropdown">
    <el-dropdown-item command="a">Action 1</el-dropdown-item>
    <el-dropdown-item command="b">Action 2</el-dropdown-item>
    <el-dropdown-item command="c">Action 3</el-dropdown-item>
    <el-dropdown-item command="d" disabled>Action 4</el-dropdown-item>
    <el-dropdown-item command="e" divided>Action 5</el-dropdown-item>
  </el-dropdown-menu>
</el-dropdown>

<style>
  .el-dropdown-link {
    cursor: pointer;
    color: #409EFF;
  }
  .el-icon-arrow-down {
    font-size: 12px;
  }
</style>

<script>
  export default {
    methods: {
      handleCommand(command) {
        this.$message('click on item ' + command);
      }
    }
  }
</script>

:::

Sizes

Besides default size, Dropdown component provides three additional sizes for you to choose among different scenarios.

:::demo Use attribute size to set additional sizes with medium, small or mini.

<el-dropdown split-button type="primary">
  Default
  <el-dropdown-menu slot="dropdown">
    <el-dropdown-item>Action 1</el-dropdown-item>
    <el-dropdown-item>Action 2</el-dropdown-item>
    <el-dropdown-item>Action 3</el-dropdown-item>
    <el-dropdown-item>Action 4</el-dropdown-item>
  </el-dropdown-menu>
</el-dropdown>

<el-dropdown size="medium" split-button type="primary">
  Medium
  <el-dropdown-menu slot="dropdown">
    <el-dropdown-item>Action 1</el-dropdown-item>
    <el-dropdown-item>Action 2</el-dropdown-item>
    <el-dropdown-item>Action 3</el-dropdown-item>
    <el-dropdown-item>Action 4</el-dropdown-item>
  </el-dropdown-menu>
</el-dropdown>

<el-dropdown size="small" split-button type="primary">
  Small
  <el-dropdown-menu slot="dropdown">
   <el-dropdown-item>Action 1</el-dropdown-item>
   <el-dropdown-item>Action 2</el-dropdown-item>
   <el-dropdown-item>Action 3</el-dropdown-item>
   <el-dropdown-item>Action 4</el-dropdown-item>
  </el-dropdown-menu>
</el-dropdown>

<el-dropdown size="mini" split-button type="primary">
  Mini
  <el-dropdown-menu slot="dropdown">
    <el-dropdown-item>Action 1</el-dropdown-item>
    <el-dropdown-item>Action 2</el-dropdown-item>
    <el-dropdown-item>Action 3</el-dropdown-item>
    <el-dropdown-item>Action 4</el-dropdown-item>
  </el-dropdown-menu>
</el-dropdown>

:::

Dropdown Attributes

Attribute Description Type Accepted Values Default
type menu button type, refer to Button Component, only works when split-button is true string — —
size menu size, also works on the split button string medium / small / mini —
split-button whether a button group is displayed boolean — false
placement placement of pop menu string top/top-start/top-end/bottom/bottom-start/bottom-end bottom-end
trigger how to trigger string hover/click hover
hide-on-click whether to hide menu after clicking menu-item boolean — true
show-timeout Delay time before show a dropdown (only works when trigger is hover) number — 250
hide-timeout Delay time before hide a dropdown (only works when trigger is hover) number — 150
tabindex tabindex of Dropdown number — 0

Dropdown Slots

Name Description
— content of Dropdown. Notice: Must be a valid html dom element (ex. <span>, <button> etc.) or el-component, to attach the trigger listener
dropdown content of the Dropdown Menu, usually a <el-dropdown-menu> element

Dropdown Events

Event Name Description Parameters
click if split-button is true, triggers when left button is clicked —
command triggers when a dropdown item is clicked the command dispatched from the dropdown item
visible-change triggers when the dropdown appears/disappears true when it appears, and false otherwise

Dropdown Menu Item Attributes

Attribute Description Type Accepted Values Default
command a command to be dispatched to Dropdown's command callback string/number/object — —
disabled whether the item is disabled boolean — false
divided whether a divider is displayed boolean — false
icon icon class name string — —