@redocly/theme/src/core/hooks/use-active-page-version.ts

Shared UI components lib

import { useThemeHooks } from './use-theme-hooks';

export function useActivePageVersion(): string | undefined {
  const { usePageVersions } = useThemeHooks();
  const { versions } = usePageVersions();
  const activeVersion = versions.find((version) => version.active);

  return activeVersion?.version;
}