如何在组合框headless-ui中设置默认选择选项?

Question

我希望第一个选项在默认情况下在下拉框中被选中。我尝试了comboboxdefaultValue属性，但没有工作。我该怎么做呢?

组合框组件

import { useState } from 'react'
import { CheckIcon, ChevronUpDownIcon } from '@heroicons/react/20/solid'
import { Combobox } from '@headlessui/react'
function classNames(...classes) {
return classes.filter(Boolean).join(' ')
}
export default function FormCombobox({
comboboxData,
label,
questionRange,
setQuestionRange,
}) {
const [query, setQuery] = useState('')
let items = comboboxData.map((item) => ({
id: item.content_object.nanoid,
name: item.content_object.name,
multiplier: item.multiplier,
}))
const filteredItems =
query === ''
? items
: items.filter((item) => {
return item.name.toLowerCase().includes(query.toLowerCase())
})
return (
<Combobox
as="div"
value={questionRange}
onChange={setQuestionRange}
className="my-5"
>
<Combobox.Label className="block text-left font-bold text-gray-700">
{label}
</Combobox.Label>
<div className="relative mt-1">
<Combobox.Input
className="w-full rounded-md border border-gray-300 bg-white py-2 pl-3 pr-10 shadow-sm focus:border-indigo-500 focus:outline-none focus:ring-1 focus:ring-indigo-500 sm:text-sm"
onChange={(event) => setQuery(event.target.value)}
displayValue={(item) => item?.name}
/>
<Combobox.Button className="absolute inset-y-0 right-0 flex items-center rounded-r-md px-2 focus:outline-none">
<ChevronUpDownIcon
className="h-5 w-5 text-gray-400"
aria-hidden="true"
/>
</Combobox.Button>
{filteredItems.length > 0 && (
<Combobox.Options className="absolute z-10 mt-1 max-h-60 w-full overflow-auto rounded-md bg-white py-1 text-base shadow-lg ring-1 ring-black ring-opacity-5 focus:outline-none sm:text-sm">
{filteredItems.map((item) => (
<Combobox.Option
key={item.id}
value={item}
className={({ active }) =>
classNames(
'relative cursor-default select-none py-2 pl-3 pr-9',
active ? 'bg-indigo-600 text-white' : 'text-gray-900'
)
}
>
{({ active, selected }) => (
<>
<span
className={classNames(
'block truncate',
selected && 'font-semibold'
)}
>
{item.name}
</span>
{selected && (
<span
className={classNames(
'absolute inset-y-0 right-0 flex items-center pr-4',
active ? 'text-white' : 'text-indigo-600'
)}
>
<CheckIcon className="h-5 w-5" aria-hidden="true" />
</span>
)}
</>
)}
</Combobox.Option>
))}
</Combobox.Options>
)}
</div>
</Combobox>
)
}

Answer 1

在声明questionRange时初始化状态

const [questionRange, setQuestionRange] = useState(items[0])