I am trying to create a contextual gadget for gmail. I followed the documentation exactly but not able to create a working version.
However, I created a gadget by making some modifications and I got it working on the main window of GMail.
But when I add the extractors like HelloWorld, by uncommenting the Require tag, it is not working.
This file is hosted in http://ripplesonline.in/gadget.working.xml and I selected all items in the scope.
Here is the gadget xml file:
<?xml version="1.0" encoding="UTF-8"?>
<Module>
  <ModulePrefs title="Hello World" description="Matches and echoes 'Hello World' string in emails" >  
    <!--
    <Require feature="google.contentmatch">
      <Param name="extractors">
        google.com:HelloWorld,google.com:SenderEmailExtractor
      </Param>
    </Require>
    -->
  </ModulePrefs>
  <Content type="html">
     <![CDATA[ 
        <script>
            function justAnAlert(){
                console.log("just a test");
                debugger
                alert("just a test");
            }
            gadgets.util.registerOnLoadHandler(justAnAlert);
        </script>
       Hello, world!
     ]]>
  </Content> 
</Module>
Thanks