title-case a string into a title (containing mixed uppercased, lettercased, acronyms, initialisations)

nice-title-case.js

const isAcronym = require('is-acronym');

getTitleCase = str => {
  str = str || '';
  return str.charAt(0).toUpperCase() + (str.substr(1) || '').toLowerCase();
};

wordsToNotCapitalise = [
  'a',
  'an',
  'the',
  'at',
  'by',
  'for',
  'in',
  'of',
  'on',
  'to',
  'up',
  'and',
  'as',
  'but',
  'or',
  'nor',

  'from',
  'into',
  'near',
  'onto',
  'with'
];

toProperCase = str => (str || '').replace(/([^\W_]+[^\s-]*) */g, word => {
  console.log('word', word, wordsToNotCapitalise.includes(word));
  if (wordsToNotCapitalise.includes(word)) {
    word = word.toLowerCase();
  } else if (isAcronym(word)) {
    word = word.toUpperCase();
  } else if (word.toUpperCase() === word || word.toLowerCase() === word) {
    word = getTitleCase(word);
  }
  return word;
});

words = ['Iphone', 'iPhone', 'IPHONE', 'NASA', 'Surfing', 'surfing', 'by', 'MySpace', 'HTML5', 'jo-Ann', 'smith', 'is', 'amazing', 'I', 'i', 'oN', 'on', 'ON', 'On'];

console.log(words);
console.log(words.map(toProperCase));