element/examples/docs/en-US/menu.md
2019-03-01 18:35:08 +08:00

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## NavMenu
Menu that provides navigation for your website.
### Top bar
Top bar NavMenu can be used in a variety of scenarios.
:::demo By default Menu is vertical, but you can change it to horizontal by setting the mode prop to 'horizontal'. In addition, you can use the submenu component to create a second level menu. Menu provides `background-color`, `text-color` and `active-text-color` to customize the colors.
```html
<el-menu :default-active="activeIndex" class="el-menu-demo" mode="horizontal" @select="handleSelect">
<el-menu-item index="1">Processing Center</el-menu-item>
<el-submenu index="2">
<template slot="title">Workspace</template>
<el-menu-item index="2-1">item one</el-menu-item>
<el-menu-item index="2-2">item two</el-menu-item>
<el-menu-item index="2-3">item three</el-menu-item>
<el-submenu index="2-4">
<template slot="title">item four</template>
<el-menu-item index="2-4-1">item one</el-menu-item>
<el-menu-item index="2-4-2">item two</el-menu-item>
<el-menu-item index="2-4-3">item three</el-menu-item>
</el-submenu>
</el-submenu>
<el-menu-item index="3" disabled>Info</el-menu-item>
<el-menu-item index="4"><a href="https://www.ele.me" target="_blank">Orders</a></el-menu-item>
</el-menu>
<div class="line"></div>
<el-menu
:default-active="activeIndex2"
class="el-menu-demo"
mode="horizontal"
@select="handleSelect"
background-color="#545c64"
text-color="#fff"
active-text-color="#ffd04b">
<el-menu-item index="1">Processing Center</el-menu-item>
<el-submenu index="2">
<template slot="title">Workspace</template>
<el-menu-item index="2-1">item one</el-menu-item>
<el-menu-item index="2-2">item two</el-menu-item>
<el-menu-item index="2-3">item three</el-menu-item>
<el-submenu index="2-4">
<template slot="title">item four</template>
<el-menu-item index="2-4-1">item one</el-menu-item>
<el-menu-item index="2-4-2">item two</el-menu-item>
<el-menu-item index="2-4-3">item three</el-menu-item>
</el-submenu>
</el-submenu>
<el-menu-item index="3" disabled>Info</el-menu-item>
<el-menu-item index="4"><a href="https://www.ele.me" target="_blank">Orders</a></el-menu-item>
</el-menu>
<script>
export default {
data() {
return {
activeIndex: '1',
activeIndex2: '1'
};
},
methods: {
handleSelect(key, keyPath) {
console.log(key, keyPath);
}
}
}
</script>
```
:::
### Side bar
Vertical NavMenu with sub-menus.
:::demo You can use the el-menu-item-group component to create a menu group, and the name of the group is determined by the title prop or a named slot.
```html
<el-row class="tac">
<el-col :span="12">
<h5>Default colors</h5>
<el-menu
default-active="2"
class="el-menu-vertical-demo"
@open="handleOpen"
@close="handleClose">
<el-submenu index="1">
<template slot="title">
<i class="el-icon-location"></i>
<span>Navigator One</span>
</template>
<el-menu-item-group title="Group One">
<el-menu-item index="1-1">item one</el-menu-item>
<el-menu-item index="1-2">item one</el-menu-item>
</el-menu-item-group>
<el-menu-item-group title="Group Two">
<el-menu-item index="1-3">item three</el-menu-item>
</el-menu-item-group>
<el-submenu index="1-4">
<template slot="title">item four</template>
<el-menu-item index="1-4-1">item one</el-menu-item>
</el-submenu>
</el-submenu>
<el-menu-item index="2">
<i class="el-icon-menu"></i>
<span>Navigator Two</span>
</el-menu-item>
<el-menu-item index="3" disabled>
<i class="el-icon-document"></i>
<span>Navigator Three</span>
</el-menu-item>
<el-menu-item index="4">
<i class="el-icon-setting"></i>
<span>Navigator Four</span>
</el-menu-item>
</el-menu>
</el-col>
<el-col :span="12">
<h5>Custom colors</h5>
<el-menu
default-active="2"
class="el-menu-vertical-demo"
@open="handleOpen"
@close="handleClose"
background-color="#545c64"
text-color="#fff"
active-text-color="#ffd04b">
<el-submenu index="1">
<template slot="title">
<i class="el-icon-location"></i>
<span>Navigator One</span>
</template>
<el-menu-item-group title="Group One">
<el-menu-item index="1-1">item one</el-menu-item>
<el-menu-item index="1-2">item one</el-menu-item>
</el-menu-item-group>
<el-menu-item-group title="Group Two">
<el-menu-item index="1-3">item three</el-menu-item>
</el-menu-item-group>
<el-submenu index="1-4">
<template slot="title">item four</template>
<el-menu-item index="1-4-1">item one</el-menu-item>
</el-submenu>
</el-submenu>
<el-menu-item index="2">
<i class="el-icon-menu"></i>
<span>Navigator Two</span>
</el-menu-item>
<el-menu-item index="3" disabled>
<i class="el-icon-document"></i>
<span>Navigator Three</span>
</el-menu-item>
<el-menu-item index="4">
<i class="el-icon-setting"></i>
<span>Navigator Four</span>
</el-menu-item>
</el-menu>
</el-col>
</el-row>
<script>
export default {
methods: {
handleOpen(key, keyPath) {
console.log(key, keyPath);
},
handleClose(key, keyPath) {
console.log(key, keyPath);
}
}
}
</script>
```
:::
### Collapse
Vertical NavMenu could be collapsed.
:::demo
```html
<el-radio-group v-model="isCollapse" style="margin-bottom: 20px;">
<el-radio-button :label="false">expand</el-radio-button>
<el-radio-button :label="true">collapse</el-radio-button>
</el-radio-group>
<el-menu default-active="2" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose" :collapse="isCollapse">
<el-submenu index="1">
<template slot="title">
<i class="el-icon-location"></i>
<span slot="title">Navigator One</span>
</template>
<el-menu-item-group>
<span slot="title">Group One</span>
<el-menu-item index="1-1">item one</el-menu-item>
<el-menu-item index="1-2">item two</el-menu-item>
</el-menu-item-group>
<el-menu-item-group title="Group Two">
<el-menu-item index="1-3">item three</el-menu-item>
</el-menu-item-group>
<el-submenu index="1-4">
<span slot="title">item four</span>
<el-menu-item index="1-4-1">item one</el-menu-item>
</el-submenu>
</el-submenu>
<el-menu-item index="2">
<i class="el-icon-menu"></i>
<span slot="title">Navigator Two</span>
</el-menu-item>
<el-menu-item index="3" disabled>
<i class="el-icon-document"></i>
<span slot="title">Navigator Three</span>
</el-menu-item>
<el-menu-item index="4">
<i class="el-icon-setting"></i>
<span slot="title">Navigator Four</span>
</el-menu-item>
</el-menu>
<style>
.el-menu-vertical-demo:not(.el-menu--collapse) {
width: 200px;
min-height: 400px;
}
</style>
<script>
export default {
data() {
return {
isCollapse: true
};
},
methods: {
handleOpen(key, keyPath) {
console.log(key, keyPath);
},
handleClose(key, keyPath) {
console.log(key, keyPath);
}
}
}
</script>
```
:::
### Menu Attribute
| Attribute | Description | Type | Accepted Values | Default |
|---------- |-------- |---------- |------------- |-------- |
| mode | menu display mode | string | horizontal / vertical | vertical |
| collapse | whether the menu is collapsed (available only in vertical mode) | boolean | — | false |
| background-color | background color of Menu (hex format) | string | — | #ffffff |
| text-color | text color of Menu (hex format) | string | — | #303133 |
| active-text-color | text color of currently active menu item (hex format) | string | — | #409EFF |
| default-active | index of currently active menu | string | — | — |
| default-openeds | array that contains indexes of currently active sub-menus | Array | — | — |
| unique-opened | whether only one sub-menu can be active | boolean | — | false |
| menu-trigger | how sub-menus are triggered, only works when `mode` is 'horizontal' | string | hover / click | hover |
| router | whether `vue-router` mode is activated. If true, index will be used as 'path' to activate the route action | boolean | — | false |
| collapse-transition | whether to enable the collapse transition | boolean | — | true |
### Menu Methods
| Methods Name | Description | Parameters |
|---------- |-------- |---------- |
| open | open a specific sub-menu | index: index of the sub-menu to open |
| close | close a specific sub-menu | index: index of the sub-menu to close |
### Menu Events
| Event Name | Description | Parameters |
|---------- |-------- |---------- |
| select | callback function when menu is activated | index: index of activated menu, indexPath: index path of activated menu |
| open | callback function when sub-menu expands | index: index of expanded sub-menu, indexPath: index path of expanded sub-menu |
| close | callback function when sub-menu collapses | index: index of collapsed sub-menu, indexPath: index path of collapsed sub-menu |
### Menu-Item Events
| Event Name | Description | Parameters |
|---------- |-------- |---------- |
| click | callback function when menu-item is clicked | el: menu-item instance |
### SubMenu Attribute
| Attribute | Description | Type | Accepted Values | Default |
|---------- |-------- |---------- |------------- |-------- |
| index | unique identification | string | — | — |
| popper-class | custom class name for the popup menu | string | — | — |
| show-timeout | timeout before showing a sub-menu | number | — | 300 |
| hide-timeout | timeout before hiding a sub-menu | number | — | 300 |
| disabled | whether the sub-menu is disabled | boolean | — | false |
| popper-append-to-body | whether to append the popup menu to body. If the positioning of the menu is wrong, you can try setting this prop | boolean | - | level one Submenu: true / other Submenus: false |
### Menu-Item Attribute
| Attribute | Description | Type | Accepted Values | Default |
|---------- |-------- |---------- |------------- |-------- |
| index | unique identification | string/null | — | null |
| route | Vue Router object | object | — | — |
| disabled | whether disabled | boolean | — | false |
### Menu-Group Attribute
| Attribute | Description | Type | Accepted Values | Default |
|---------- |-------- |---------- |------------- |-------- |
| title | group title | string | — | — |