Строка переноса слов

const wordWrap = (str, max, br = '\n') => str.replace(
  new RegExp(`(?![^\\n]{1,${max}}$)([^\\n]{1,${max}})\\s`, 'g'), '$1' + br
);

wordWrap(
  'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce tempus.',
  32
);
// 'Lorem ipsum dolor sit amet,\nconsectetur adipiscing elit.\nFusce tempus.'
wordWrap(
  'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce tempus.',
  32,
  '\r\n'
);
// 'Lorem ipsum dolor sit amet,\r\nconsectetur adipiscing elit.\r\nFusce tempus.'