Handlebars.js Filters for Strings

strings.js

/**
 * Basic Standard Filters for strings:
 *
 *     {{size "Plus"}}
 * 
 * Would give you 4!
 *
 * @author: Nijiko Yonskai
 */
var strings = {
  size: function (input) {
    return input ? input.length : 0;
  },

  downcase: function (input) {
    return typeof input === 'string' ? input.toLowerCase() : input;
  },

  upcase: function (input) {
    return typeof input === 'string' ? input.toUpperCase() : input;
  },

  capitalize: function (input) {
    return typeof input === 'string' ? input.charAt(0).toUpperCase() + input.slice(1) : input;
  },

  escape: function (input) {
    return escape(input);
  },

  slug: function (input) {
    if (!input || typeof input !== 'string') return input;
    return input.replace(/^\s+|\s+$/g, '').toLowerCase().replace(/[^a-z0-9 -]/g, '').replace(/\s+/g, '-').replace(/-+/g, '-');
  }
}

// Require & HBS.js
//for (var i in strings) {
//  define('template/helpers/' + i, [ 'Handlebars' ], function (Handlebars) {
//    Handlebars.registerHelper(i, strings[i]);
//    return strings[i];
//  });
//}

// Handlebars.js
for (var i in strings) {
  Handlebars.registerHelper(i, strings[i]);
}