function invertObject(targetObj) {
  const result = {};
  const mapKeys = Object.keys(targetObj);

  // eslint-disable-next-line no-for-of-loops/no-for-of-loops
  for (const originalKey of mapKeys) {
    const originalVal = targetObj[originalKey];

    result[originalVal] = originalKey;
  }

  return result;
}
turns
  { 'MUCH ERROR': '0', 'SUCH WRONG': '1' }
into
  { 0: 'MUCH ERROR', 1: 'SUCH WRONG' }