supabase/apps/design-system/registry/default/example/combobox-demo.tsx

'use client'

import { Check, ChevronsUpDown } from 'lucide-react'
import * as React from 'react'

import { cn } from '@/lib/utils'
import {
  Button,
  Command_Shadcn_,
  CommandEmpty_Shadcn_,
  CommandGroup_Shadcn_,
  CommandInput_Shadcn_,
  CommandItem_Shadcn_,
  CommandList_Shadcn_,
  Popover_Shadcn_,
  PopoverContent_Shadcn_,
  PopoverTrigger_Shadcn_,
} from 'ui'

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',
  },
]

export default function ComboboxDemo() {
  const [open, setOpen] = React.useState(false)
  const [value, setValue] = React.useState('')

  return (
    <Popover_Shadcn_ open={open} onOpenChange={setOpen}>
      <PopoverTrigger_Shadcn_ asChild>
        <Button
          type="default"
          role="combobox"
          size={'small'}
          aria-expanded={open}
          className="w-[200px] justify-between"
          iconRight={<ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />}
        >
          {value
            ? frameworks.find((framework) => framework.value === value)?.label
            : 'Select framework...'}
        </Button>
      </PopoverTrigger_Shadcn_>
      <PopoverContent_Shadcn_ className="w-[200px] p-0">
        <Command_Shadcn_>
          <CommandInput_Shadcn_ placeholder="Search framework..." />
          <CommandList_Shadcn_>
            <CommandEmpty_Shadcn_>No framework found.</CommandEmpty_Shadcn_>
            <CommandGroup_Shadcn_>
              {frameworks.map((framework) => (
                <CommandItem_Shadcn_
                  key={framework.value}
                  value={framework.value}
                  onSelect={(currentValue) => {
                    setValue(currentValue === value ? '' : currentValue)
                    setOpen(false)
                  }}
                >
                  <Check
                    className={cn(
                      'mr-2 h-4 w-4',
                      value === framework.value ? 'opacity-100' : 'opacity-0'
                    )}
                  />
                  {framework.label}
                </CommandItem_Shadcn_>
              ))}
            </CommandGroup_Shadcn_>
          </CommandList_Shadcn_>
        </Command_Shadcn_>
      </PopoverContent_Shadcn_>
    </Popover_Shadcn_>
  )
}