mask_iban.js

var IBAN_MASKS = {
            'default': 'SSSS SSSS SSSS SSSS SSSS SSSS SSSS SSSS',
            'AD': 'SSSS SSSS SSSS SSSS SSSS SSSS',
            'AL': 'SSSS SSSS SSSS SSSS SSSS SSSS SSSS',
            'AT': 'SSSS SSSS SSSS SSSS SSSS',
            'BA': 'SSSS SSSS SSSS SSSS SSSS',
            'BE': 'SSSS SSSS SSSS SSSS',
            'BG': 'SSSS SSSS SSSS SSSS SSSS SS',
            'CH': 'SSSS SSSS SSSS SSSS SSSS S',
            'CY': 'SSSS SSSS SSSS SSSS SSSS SSSS SSSS',
            'CZ': 'SSSS SSSS SSSS SSSS SSSS SSSS',
            'DE': 'SSSS SSSS SSSS SSSS SSSS SS',
            'DK': 'SSSS SSSS SSSS SSSS SS',
            'EE': 'SSSS SSSS SSSS SSSS SSSS',
            'ES': 'SSSS SSSS SSSS SSSS SSSS SSSS',
            'FI': 'SSSS SSSS SSSS SSSS SS',
            'FO': 'SSSS SSSS SSSS SSSS SS',
            'FR': 'SSSS SSSS SSSS SSSS SSSS SSSS SSS',
            'GB': 'SSSS SSSS SSSS SSSS SSSS SS',
            'GE': 'SSSS SSSS SSSS SSSS SSSS SS',
            'GG': 'SSSS SSSS SSSS SSSS SSSS SS',
            'GI': 'SSSS SSSS SSSS SSSS SSSS SSS',
            'GL': 'SSSS SSSS SSSS SSSS SS',
            'GR': 'SSSS SSSS SSSS SSSS SSSS SSSS SSS',
            'HR': 'SSSS SSSS SSSS SSSS SSSS S',
            'HU': 'SSSS SSSS SSSS SSSS SSSS SSSS SSSS',
            'IE': 'SSSS SSSS SSSS SSSS SSSS SS',
            'IS': 'SSSS SSSS SSSS SSSS SSSS SSSS SS',
            'IT': 'SSSS SSSS SSSS SSSS SSSS SSSS SSS',
            'LI': 'SSSS SSSS SSSS SSSS SSSS S',
            'LT': 'SSSS SSSS SSSS SSSS SSSS',
            'LU': 'SSSS SSSS SSSS SSSS SSSS',
            'LV': 'SSSS SSSS SSSS SSSS SSSS S',
            'MC': 'SSSS SSSS SSSS SSSS SSSS SSSS SSS',
            'MD': 'SSSS SSSS SSSS SSSS SSSS SSSS',
            'ME': 'SSSS SSSS SSSS SSSS SSSS SS',
            'MK': 'SSSS SSSS SSSS SSSS SSS',
            'MT': 'SSSS SSSS SSSS SSSS SSSS SSSS SSSS SSS',
            'NL': 'SSSS SSSS SSSS SSSS SS',
            'NO': 'SSSS SSSS SSSS SSS',
            'PL': 'SSSS SSSS SSSS SSSS SSSS SSSS SSSS',
            'PT': 'SSSS SSSS SSSS SSSS SSSS SSSS S',
            'RO': 'SSSS SSSS SSSS SSSS SSSS SSSS',
            'RS': 'SSSS SSSS SSSS SSSS SSSS SS',
            'SE': 'SSSS SSSS SSSS SSSS SSSS SSSS',
            'SI': 'SSSS SSSS SSSS SSSS SSS',
            'SK': 'SSSS SSSS SSSS SSSS SSSS SSSS',
            'SM': 'SSSS SSSS SSSS SSSS SSSS SSSS SSS',
            'UA': 'SSSS SSSS SSSS SSSS SSSS SSSS SSSS S',
        };

        var mask = IBAN_MASKS[country_code] || IBAN_MASKS['default'];
        var placeholder = ' ';

        var is_swiss_postfinance_number = country_code == 'CH' && (bic == 'POFICHBEXXX' || bic == '09000');

        if (is_swiss_postfinance_number) {
            mask = '00-0000-0';
            if (value.length == 10) {
                mask = '00-00000-0';
            } else if (value.length == 11) {
                mask = '00-000000-0';
            }
            placeholder = '-'
        }

        value = $dummyInput.mask(mask, {
            translation: {
                'S': {
                    pattern: /[0-9A-Za-z]/
                }
            },
            placeholder: placeholder
        }).val();
        return maskString(value, mask, {
          'S': /[0-9A-Za-z]/,
          '0': /[0-9]/,
        });
    }

        return value;
  function maskString(value, mask, maskPatterns) {
    value = value || ''
    mask = mask || '';
    maskPatterns = maskPatterns || {};

    var maskedValue = '';
    // array representation of string under test
    var valueParts = value.split('');
    // array representation of the mask
    var maskParts = mask.split('');

    // as long as there are still characters left in
    // the original string, one must try to mask them
    while (valueParts.length > 0) {
      // take the first character and remove
      // it from the original string
      var unmaskedChar = valueParts.shift();

      // as long as the character has not been masked
      // one must try to find a masking character
      while (unmaskedChar !== null) {
        // take the first mask character from
        // the mask string
        var maskChar = maskParts.shift();

        // make sure the masking character exists
        // otherwise this means that the original string
        // exceeds the masking pattern length
        if (maskChar !== undefined) {
          // try to find a pattern for the particular
          // mask character
          var maskPattern = maskPatterns[maskChar.toUpperCase()];

          // if there is no pattern configured for
          // this particular mask character, assume
          // the mask character is a placeholder
          // that must be added to the string
          if (maskPattern !== undefined) {
            var check = false;

            // mask pattern can be either a function
            if (typeof maskPattern === 'function') {
              check = maskPattern(unmaskedChar);
            }
            // or a regex string
            else if (maskPattern instanceof RegExp) {
              check = maskPattern.test(unmaskedChar);
            }

            // if character has passed the mask check,
            // it can bee added to the final masked value
            if (check) {
              maskedValue += unmaskedChar;
            }
            // otherwise one must put the pattern back into
            // the array so the next character can try to
            // pass the mask check
            else {
              maskParts.unshift(maskChar);
            }

            unmaskedChar = null;
          }
          // mask character is a placeholder / formatting value
          // and must be added to the masked string
          else {
            maskedValue += maskChar;
          }
        }
        // no masking character has been found,
        // the original string is probably longer
        // then the mask pattern and therefore
        // the leftovers can be cut off
        else {
          // reset current character to continue the loop
          unmaskedChar = null;
        }
      }
    }

    return maskedValue;
  }