titlecase.js

angular.module('cm.shared')
.filter('titlecase', function() {
  return function(input) {
    if (!input) {
      return input;
    }
    var smallWords = /^(a|an|and|as|at|but|by|en|for|if|in|nor|of|on|or|per|the|to|vs?\.?|via)$/i;

    return input.toLowerCase().replace(/[A-Za-z0-9\u00C0-\u00FF]+[^\s-]*/g, function(match, index, title) {
      if (index > 0 && index + match.length !== title.length &&
        match.search(smallWords) > -1 && title.charAt(index - 2) !== ':' &&
        (title.charAt(index + match.length) !== '-' || title.charAt(index - 1) === '-') &&
        title.charAt(index - 1).search(/[^\s-]/) < 0) {
        return match.toLowerCase();
      }

      if (match.substr(1).search(/[A-Z]|\../) > -1) {
        return match;
      }

      return match.charAt(0).toUpperCase() + match.substr(1);
    });
  };
});