Generating JavaScript from a Grails controller

JavaScriptController.groovy

class JavaScriptController {
  
  def i18NService
  /**
   * Render dynamic JavaScript to the browser. It can be used in a GSP as:
   * 
   * <script type='text/javascript' src='${createLink(controller: "javaScript", action: "scripts")}'></script>
   * 
   * You can access i18n messages in javascript with window.messages variable. Example:
   * 
   * alert(window.messages['my.message.key']);
   * 
   */
  def scripts() {
    Locale locale = RequestContextUtils.getLocale(request)
    String messages = i18NService.messagesToJavaScript(locale)
    //if you're using JQuery, check http://api.jquery.com/jQuery.parseJSON/
    //String content = "I18N.messages = $.parseJSON('$messages');" 
    //For old browsers check http://stackoverflow.com/questions/4430472/how-do-i-use-json-in-older-browsers
    String content = "I18N = {}; \n I18N.messages = JSON.parse('$messages');" 
    render contentType: 'text/javascript', text: content
  }
  
}