naive-ui/demo/documentation/components/menu/enUS/defaultOpenNames.md
2020-02-07 22:31:26 +08:00

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# Opened Submenu
You can set `default-open-names` to make menu work in an uncontrolled manner or use `open-names` and `@open-names-change` to make it work in a controlled manner.
```html
<n-menu
v-model="activeName"
:default-open-names="defaultOpenNames"
@open-names-change="handleOpenNamesChange"
@select="handleSelect"
>
<n-menu-item title="Hear the Wind Sing" name="hear-the-wind-sing">
<template v-slot:icon>
<n-icon>
<book-icon />
</n-icon>
</template>
</n-menu-item>
<n-submenu title="Pinball, 1973" name="pinball-1973" disabled>
<template v-slot:icon>
<n-icon>
<book-icon />
</n-icon>
</template>
<n-menu-item title="Rat" name="rat" />
</n-submenu>
<n-menu-item title="A Wild Sheep Chase" name="a-wild-sheep-chase" disabled>
<template v-slot:icon>
<n-icon>
<book-icon />
</n-icon>
</template>
</n-menu-item>
<n-submenu title="Dance Dance Dance" name="dance-dance-dance">
<template v-slot:icon>
<n-icon>
<book-icon />
</n-icon>
</template>
<n-menu-item-group title="Characters">
<n-menu-item title="Narrator" name="narrator">
<template v-slot:icon>
<n-icon>
<person-icon />
</n-icon>
</template>
</n-menu-item>
<n-menu-item title="Sheep Man" name="sheep-man">
<template v-slot:icon>
<n-icon>
<person-icon />
</n-icon>
</template>
</n-menu-item>
</n-menu-item-group>
<n-submenu title="Beverage" name="beverage">
<template v-slot:icon>
<n-icon>
<wine-icon />
</n-icon>
</template>
<n-menu-item title="Whisky" name="whisky" />
</n-submenu>
<n-submenu title="Food" name="food">
<n-menu-item title="Sandwich" name="sandwich" />
</n-submenu>
<n-menu-item title="The past increases. The future recedes." name="the-past-increases-the-future-recedes" />
</n-submenu>
</n-menu>
```
```js
import bookIcon from 'naive-ui/lib/icons/book-outline'
import personIcon from 'naive-ui/lib/icons/person-outline'
import wineIcon from 'naive-ui/lib/icons/wine-outline'
export default {
components: {
bookIcon,
personIcon,
wineIcon
},
data () {
return {
defaultOpenNames: ['dance-dance-dance', 'food'],
activeName: null
}
},
methods: {
handleSelect (value) {
this.$NMessage.info('Select: ' + JSON.stringify(value))
},
handleOpenNamesChange (value) {
this.$NMessage.info('OpenNamesChange: ' + JSON.stringify(value))
}
}
}
```