dni-js/src/letterMap.js

Compute and validate a Spanish DNI/NIE number

const LETTERS = {
  0: 'T',
  1: 'R',
  2: 'W',
  3: 'A',
  4: 'G',
  5: 'M',
  6: 'Y',
  7: 'F',
  8: 'P',
  9: 'D',
  10: 'X',
  11: 'B',
  12: 'N',
  13: 'J',
  14: 'Z',
  15: 'S',
  16: 'Q',
  17: 'V',
  18: 'H',
  19: 'L',
  20: 'C',
  21: 'K',
  22: 'E'
};

module.exports = LETTERS