node_modules/is-alphabetical/index.js

'use strict'

module.exports = alphabetical

// Check if the given character code, or the character code at the first
// character, is alphabetical.
function alphabetical(character) {
  var code = typeof character === 'string' ? character.charCodeAt(0) : character

  return (
    (code >= 97 && code <= 122) /* a-z */ ||
    (code >= 65 && code <= 90) /* A-Z */
  )
}