import getSortNamesFn, { FIRST_ASC_LAST_ASC } from 'sort-names';

// get a sorting function for Swedish locale and prefer showing first name first
const sortNamesFn = getSortNamesFn(FIRST_ASC_LAST_ASC, 'sv');

// sort the data
[
  { cardFields: { firstName: 'ä', lastName: '' } },
  { cardFields: { firstName: 'z', lastName: 'ä' } },
  { cardFields: { firstName: 'z', lastName: 'z' } },
].sort(sortNamesFn)