docs/components/article/ArticleVersionPicker.tsx

import { useRouter } from 'next/router'
import { Dropdown } from '@primer/components'

import { Link } from 'components/Link'
import { useMainContext } from 'components/context/MainContext'
import { useVersion } from 'components/hooks/useVersion'
import { useTranslation } from 'components/hooks/useTranslation'

export const ArticleVersionPicker = () => {
  const router = useRouter()
  const { currentVersion } = useVersion()
  const { allVersions, page, enterpriseServerVersions } = useMainContext()
  const { t } = useTranslation('pages')

  if (page.permalinks && page.permalinks.length <= 1) {
    return null
  }

  return (
    <Dropdown
      css={`
        ul {
          width: unset;
        }
      `}
    >
      <summary className="f4 h5-mktg btn-outline-mktg btn-mktg p-2">
        <span className="d-md-none d-xl-inline-block">{t('article_version')}</span>{' '}
        {allVersions[currentVersion].versionTitle}
        <Dropdown.Caret />
      </summary>
      <Dropdown.Menu direction="sw">
        {(page.permalinks || []).map((permalink) => {
          if (permalink.pageVersion === 'homepage') {
            return null
          }

          return (
            <Dropdown.Item key={permalink.href}>
              <Link href={permalink.href}>{permalink.pageVersionTitle}</Link>
            </Dropdown.Item>
          )
        })}
        <div className="pb-1">
          <Link
            href={`/${router.locale}/${enterpriseServerVersions[0]}/admin/all-releases`}
            className="f6 no-underline color-text-tertiary pl-3 pr-2 no-wrap"
          >
            See all Enterprise releases
          </Link>
        </div>
      </Dropdown.Menu>
    </Dropdown>
  )
}