压缩菜单

可以让垂直菜单随着边栏压缩。使用 collapsed 属性控制菜单状态。必需设定 collapsed-width 来确保菜单正常显示。除此之外还有一些其他和压缩有关的属性：icon-size、collapsed-icon-size、popover-body-style。详细信息参考页面底下的 API 文档。

<n-space vertical>
  <n-switch v-model:value="collapsed" />
  <n-layout>
    <n-layout-sider
      collapse-mode="width"
      :collapsed-width="64"
      :width="240"
      :collapsed="collapsed"
      show-toggle-button
      @collapse="collapsed = true"
      @expand="collapsed = false"
    >
      <n-menu
        :collapsed="collapsed"
        :collapsed-width="64"
        :collapsed-icon-size="22"
        :items="menuItems"
        v-model:value="activeKey"
      />
    </n-layout-sider>
    <n-layout>
      <n-layout-content>
        <span>内容</span>
      </n-layout-content>
    </n-layout>
  </n-layout>
</n-space>

import { h, resolveComponent } from 'vue'
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'

function renderIcon(icon) {
  return () => h(resolveComponent('n-icon'), null, { default: () => h(icon) })
}

const menuItems = [
  {
    title: '且听风吟',
    key: 'hear-the-wind-sing',
    icon: renderIcon(bookIcon)
  },
  {
    title: '1973年的弹珠玩具',
    key: 'pinball-1973',
    icon: renderIcon(bookIcon),
    disabled: true,
    children: [
      {
        title: '鼠',
        key: 'rat'
      }
    ]
  },
  {
    title: '寻羊冒险记',
    key: 'a-wild-sheep-chase',
    disabled: true,
    icon: renderIcon(bookIcon)
  },
  {
    title: '舞，舞，舞',
    key: 'dance-dance-dance',
    icon: renderIcon(bookIcon),
    children: [
      {
        type: 'group',
        title: '人物',
        key: 'people',
        children: [
          {
            title: '叙事者',
            key: 'narrator',
            icon: renderIcon(personIcon)
          },
          {
            title: '羊男',
            key: 'sheep-man',
            icon: renderIcon(personIcon)
          }
        ]
      },
      {
        title: '饮品',
        key: 'beverage',
        icon: renderIcon(wineIcon),
        children: [
          {
            title: '威士忌',
            key: 'whisky'
          }
        ]
      },
      {
        title: '食物',
        key: 'food',
        children: [
          {
            title: '三明治',
            key: 'sandwich'
          }
        ]
      },
      {
        title: '过去增多，未来减少',
        key: 'the-past-increases-the-future-recedes'
      }
    ]
  }
]

export default {
  data () {
    return {
      activeKey: null,
      collapsed: true,
      menuItems
    }
  }
}

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压缩菜单

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