Title Case a string; one for automating method calls, another for titles of articles, books, etc.

titleCase.js

/**
 * use this helper function to convert captured html element attributes
 * (or whatever) to a title cased string.
 *
 * @date   2017-08-22
 * @author mattbontrager
 * @param  {String}   string [the string to be converted to CamelCase]
 * @return {String}          [the CamelCased string]
 */
function titleCaseWithSymbols(string) {
	if (!string) {
		return false;
	}
	var spaced = string.replace(/[-_]/g, " ");
	return spaced.replace(/\w\S*/g, function(txt) {
		return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
	});
}


/**
 * This is a helper function that correctly converts a string of text to Title Case.
 * @date   2017-08-22
 * @author mattbontrager
 * @param  {String}   string the string to be converted to title case
 * @return {String}          the converted string
 */
function titleCase(string) {
	if (!string) {
		return false;
	}
	var doNotCapitalize = ["a", "an", "the", "at", "by", "for", "in", "of", "on", "to", "up", "and", "as", "but", "or", "nor"],
		space = ' ',
		words = string.split(' '), // array
		numOfWords = words.length - 1,
		returnArray = string.toLowerCase().split(' ').map(function(word) {
			var isInArray = doNotCapitalize.indexOf(word);
			return (isInArray !== -1) ? word: word.replace(word[0], word[0].toUpperCase());
		}),
		firstWord = returnArray[0],
		lastWord = returnArray[numOfWords],
		returnString;

	// Capitalize the first and last word regardless of whether or not they're in doNotCapitalize
	returnArray[0] = firstWord.replace(firstWord[0], firstWord[0].toUpperCase());
	returnArray[numOfWords] = lastWord.replace(lastWord[0], lastWord[0].toUpperCase());

	// Convert the array of words back to a string
	returnString = returnArray.join(' ');

	return returnString;
}