JS: Render Handlebars template with ajax

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/**
 * Requests for Handlebars Templates with jquery ajax function
 *
 * Usage:
 * var template = Handlebars.renderTemplate('templateName', templateData);
 *
 * Feel free to append template anywhere else after.
 *
 * @author : Zell Liew
 *
 * Code adapted from Tal Bereznitskey's Handlebars.getTemplate gist at https://gist.github.com/berzniz/2900905
 */

Handlebars.renderTemplate = function(name, data) {
  var template;
  if (Handlebars.templates === undefined || Handlebars.templates[name] === undefined) {
    template = Handlebars.getTemplate(name);
  } else {
    template = Handlebars.templates[name];
  }
  return template(data);
}

Handlebars.getTemplate = function(name) {
  $.ajax({
    url: 'templates/' + name + '.html',
    success: function(data) {
      if (Handlebars.templates === undefined) {
        Handlebars.templates = {};
      }
      Handlebars.templates[name] = Handlebars.compile(data);
    },
    async: false
  });
  return Handlebars.templates[name];
};