hexo/node_modules/upper-case/upper-case.js

/**
 * Special language-specific overrides.
 *
 * Source: ftp://ftp.unicode.org/Public/UCD/latest/ucd/SpecialCasing.txt
 *
 * @type {Object}
 */
var LANGUAGES = {
  tr: {
    regexp: /[\u0069]/g,
    map: {
      '\u0069': '\u0130'
    }
  },
  az: {
    regexp: /[\u0069]/g,
    map: {
      '\u0069': '\u0130'
    }
  },
  lt: {
    regexp: /[\u0069\u006A\u012F]\u0307|\u0069\u0307[\u0300\u0301\u0303]/g,
    map: {
      '\u0069\u0307': '\u0049',
      '\u006A\u0307': '\u004A',
      '\u012F\u0307': '\u012E',
      '\u0069\u0307\u0300': '\u00CC',
      '\u0069\u0307\u0301': '\u00CD',
      '\u0069\u0307\u0303': '\u0128'
    }
  }
}

/**
 * Upper case a string.
 *
 * @param  {String} str
 * @return {String}
 */
module.exports = function (str, locale) {
  var lang = LANGUAGES[locale]

  str = str == null ? '' : String(str)

  if (lang) {
    str = str.replace(lang.regexp, function (m) { return lang.map[m] })
  }

  return str.toUpperCase()
}