Apache Struts 2 Documentation > Home > Guides > Tag Developers Guide > Struts Tags > UI Tags > Themes and Templates > ajax theme > ajax head template
Added by Patrick Lightbody, last edited by Dave Newton on Apr 07, 2007  (view change)

The ajax head template builds upon the xhtml head template by providing additional JavaScript includes for the Dojo Toolkit, which is used by the ajax a template, ajax div template , and the ajax tabbedPanel template. It is required to use this tag, <ww:head theme="ajax"/>, in your HTML <head> block if you wish to use AJAX feature. The contents of head.ftl are:

<#--
/*
 * $Id: pom.xml 559206 2007-07-24 21:01:18Z apetrelli $
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
-->
<script language="JavaScript" type="text/javascript">
    // Dojo configuration
    djConfig = {
        isDebug: ${parameters.debug?default(false)?string},
        bindEncoding: "${parameters.encoding}"
        <#if parameters.baseRelativePath?if_exists != "">
          ,baseRelativePath: "<@s.url value='${parameters.baseRelativePath}' includeParams='none' encode='false' />"
          ,baseScriptUri: "<@s.url value='${parameters.baseRelativePath}' includeParams='none' encode='false' />"
        <#else>
          ,baseRelativePath: "${base}/struts/dojo/"
          ,baseScriptUri: "${base}/struts/dojo/"
        </#if>  
        <#if parameters.locale?if_exists != "">
          ,locale: "${parameters.locale}"
        </#if>
        <#if parameters.extraLocales?exists>
          ,extraLocale: [
        	<#list parameters.extraLocales as locale>
        		"${locale}"<#if locale_has_next>,</#if>
        	</#list>
          ]
        </#if>
         ,parseWidgets : ${parameters.parseContent?string}
        
    };
</script>

<#if parameters.compressed?default(true)>
  <#assign dojoFile="dojo.js">
<#else>
  <#assign dojoFile="dojo.js.uncompressed.js">
</#if>

<#if parameters.cache?default(false)>
  <#assign profile="struts_">
<#else>
  <#assign profile="">
</#if>           

<#if parameters.baseRelativePath?if_exists != "">
  <script language="JavaScript" type="text/javascript"
        src="<@s.url value='${parameters.baseRelativePath}/${profile}${dojoFile}' includeParams='none' encode='false'  />"></script>
<#else>
  <script language="JavaScript" type="text/javascript"
        src="${base}/struts/dojo/${profile}${dojoFile}"></script>
</#if>  

<script language="JavaScript" type="text/javascript"
        src="${base}/struts/ajax/dojoRequire.js"></script>
<link rel="stylesheet" href="${base}/struts/xhtml/styles.css" type="text/css"/>
<script language="JavaScript" src="${base}/struts/utils.js" type="text/javascript"></script>
<script language="JavaScript" src="${base}/struts/xhtml/validation.js" type="text/javascript"></script>
<script language="JavaScript" src="${base}/struts/css_xhtml/validation.js" type="text/javascript"></script>

If you are having trouble getting the AJAX theme to work, you should include the above JavaScript in your page manually, changing "isDebug: false" to "isDebug: true". This will log out debugging information directly to the screen.

Note that Dojo is configured to use the same character encoding specified in struts.properties, typically UTF-8. For a simple example of how to use the head tag with the AJAX theme, simply do the following in your HTML:

<sx:head cache="true"/>

The above sample is from Struts trunk; for 2.0.6 you should use <s:head debug="true"/>.