组合框 (Combobox)

Copy<script setup lang="ts">
import { CheckIcon, ChevronsUpDownIcon } from 'lucide-vue-next'
import { computed, ref } from 'vue'
import { cn } from '@/lib/utils'
import { Button } from '@/components/ui/button'
import {
  Command,
  CommandEmpty,
  CommandGroup,
  CommandInput,
  CommandItem,
  CommandList,
} from '@/components/ui/command'
import {
  Popover,
  PopoverContent,
  PopoverTrigger,
} from '@/components/ui/popover'

const frameworks = [
  {
    value: 'next.js',
    label: 'Next.js',
  },
  {
    value: 'sveltekit',
    label: 'SvelteKit',
  },
  {
    value: 'nuxt.js',
    label: 'Nuxt.js',
  },
  {
    value: 'remix',
    label: 'Remix',
  },
  {
    value: 'astro',
    label: 'Astro',
  },
]

const open = ref(false)
const value = ref('')

const selectedFramework = computed(() =>
  frameworks.find(framework => framework.value === value.value),
)

function selectFramework(selectedValue: string) {
  value.value = selectedValue === value.value ? '' : selectedValue
  open.value = false
}
</script>

<template>
  <Popover v-model:open="open">
    <PopoverTrigger as-child>
      <Button
        variant="outline"
        role="combobox"
        :aria-expanded="open"
        class="w-[200px] justify-between"
      >
        {{ selectedFramework?.label || "Select framework..." }}
        <ChevronsUpDownIcon class="opacity-50" />
      </Button>
    </PopoverTrigger>
    <PopoverContent class="w-[200px] p-0">
      <Command>
        <CommandInput class="h-9" placeholder="Search framework..." />
        <CommandList>
          <CommandEmpty>No framework found.</CommandEmpty>
          <CommandGroup>
            <CommandItem
              v-for="framework in frameworks"
              :key="framework.value"
              :value="framework.value"
              @select="(ev) => {
                selectFramework(ev.detail.value as string)
              }"
            >
              {{ framework.label }}
              <CheckIcon
                :class="cn(
                  'ml-auto',
                  value === framework.value ? 'opacity-100' : 'opacity-0',
                )"
              />
            </CommandItem>
          </CommandGroup>
        </CommandList>
      </Command>
    </PopoverContent>
  </Popover>
</template>