如何为HeadlessUI的Combobox添加hover悬浮信息展示功能？

完全可以实现这个需求，只需要通过跟踪鼠标悬浮的选项，再渲染对应的附加信息即可，以下是修改后的完整代码：

import { Fragment, useState } from 'react'
import { Combobox, Transition } from '@headlessui/react'
import { CheckIcon, SelectorIcon } from '@heroicons/react/solid'

const people = [
  { id: 1, name: 'Wade Cooper', info: 'test1' },
  { id: 2, name: 'Arlene Mccoy', info: 'test2' },
  { id: 3, name: 'Devon Webb', info: 'test3' },
  { id: 4, name: 'Tom Cook', info: 'test4' },
  { id: 5, name: 'Tanya Fox', info: 'test5' },
  { id: 6, name: 'Hellen Schmidt', info: 'test6' },
]

export default function Example() {
  const [selected, setSelected] = useState(people[0])
  const [query, setQuery] = useState('')
  // 跟踪当前悬浮的选项
  const [hoveredPerson, setHoveredPerson] = useState(null)

  const filteredPeople =
    query === ''
      ? people
      : people.filter((person) =>
          person.name
            .toLowerCase()
            .replace(/\s+/g, '')
            .includes(query.toLowerCase().replace(/\s+/g, ''))
        )

  return (
    <div className="fixed top-16 w-72">
      <Combobox value={selected} onChange={setSelected}>
        <div className="relative mt-1">
          <div className="relative w-full cursor-default overflow-hidden rounded-lg bg-white text-left shadow-md focus:outline-none focus-visible:ring-2 focus-visible:ring-white focus-visible:ring-opacity-75 focus-visible:ring-offset-2 focus-visible:ring-offset-teal-300 sm:text-sm">
            <Combobox.Input
              className="w-full border-none py-2 pl-3 pr-10 text-sm leading-5 text-gray-900 focus:ring-0"
              displayValue={(person) => person.name}
              onChange={(event) => setQuery(event.target.value)}
            />
            <Combobox.Button className="absolute inset-y-0 right-0 flex items-center pr-2">
              <SelectorIcon
                className="h-5 w-5 text-gray-400"
                aria-hidden="true"
              />
            </Combobox.Button>
          </div>
          <Transition
            as={Fragment}
            leave="transition ease-in duration-100"
            leaveFrom="opacity-100"
            leaveTo="opacity-0"
            afterLeave={() => setQuery('')}
          >
            <Combobox.Options className="absolute 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">
              {filteredPeople.length === 0 && query !== '' ? (
                <div className="relative cursor-default select-none py-2 px-4 text-gray-700">
                  Nothing found.
                </div>
              ) : (
                filteredPeople.map((person) => (
                  <Combobox.Option
                    key={person.id}
                    className={({ active }) =>
                      `relative cursor-default select-none py-2 pl-10 pr-4 ${active ? 'bg-teal-600 text-white' : 'text-gray-900'}`
                    }
                    value={person}
                    // 添加悬浮事件跟踪当前选项
                    onMouseEnter={() => setHoveredPerson(person)}
                    onMouseLeave={() => setHoveredPerson(null)}
                  >
                    {({ selected, active }) => (
                      <>
                        <span
                          className={`block truncate ${selected ? 'font-medium' : 'font-normal'}`}
                        >
                          {person.name}
                        </span>
                        {/* 显示附加信息，仅当当前选项悬浮时展示 */}
                        {hoveredPerson?.id === person.id && (
                          <span className={`absolute right-4 top-1/2 -translate-y-1/2 ${active ? 'text-white' : 'text-gray-500'}`}>
                            {person.info}
                          </span>
                        )}
                        {selected ? (
                          <span
                            className={`absolute inset-y-0 left-0 flex items-center pl-3 ${active ? 'text-white' : 'text-teal-600'}`}
                          >
                            <CheckIcon className="h-5 w-5" aria-hidden="true" />
                          </span>
                        ) : null}
                      </>
                    )}
                  </Combobox.Option>
                ))
              )}
            </Combobox.Options>
          </Transition>
        </div>
      </Combobox>
    </div>
  )
}

关键修改点： #

• 添加hoveredPerson状态，记录当前鼠标悬浮的选项对象
• 在Combobox.Option上绑定onMouseEnter和onMouseLeave事件，更新悬浮状态
• 在选项内部判断当前悬浮项是否为当前渲染项，若是则展示对应的info内容（示例中放在选项右侧，可根据需求调整为弹窗tooltip等样式）

内容的提问来源于stack exchange，提问作者Leo Messi