There is no variable named 'a' in your code snippet. It might be another problem.
Martin Grigorov Wicket Training and Consulting https://twitter.com/mtgrigorov On Wed, Jan 18, 2017 at 10:04 AM, James Selvakumar <ja...@mcruncher.com> wrote: > Hi Martin, > > I tried your suggestion but I'm still getting the same TypeError. > > On Wed, Jan 18, 2017 at 4:55 PM, James Selvakumar <ja...@mcruncher.com> > wrote: > > > Thanks Martin for the super fast reply. I'll try that out. > > > > On Wed, Jan 18, 2017 at 4:54 PM, Martin Grigorov <mgrigo...@apache.org> > > wrote: > > > >> var wcall = Wicket.Ajax.get({ u: '${callbackUrl}'}); > >> should be > >> var wcall = Wicket.Ajax.get({ u: window.callbackUrl }); > >> > >> Martin Grigorov > >> Wicket Training and Consulting > >> https://twitter.com/mtgrigorov > >> > >> On Wed, Jan 18, 2017 at 9:51 AM, James Selvakumar <ja...@mcruncher.com> > >> wrote: > >> > >> > Dear Wicket team, > >> > > >> > I need to make a call to a Wicket page from my JavaScript function. > >> > I followed the guide Calling Wicket from Javascript > >> > <https://cwiki.apache.org/confluence/display/WICKET/ > >> > Calling+Wicket+from+Javascript> > >> > and managed to define an ajax behavior to respond to the JavaScript > >> call. > >> > > >> > My ajax behavior looks like this: > >> > > >> > > private final AbstractDefaultAjaxBehavior behave = new > >> > AbstractDefaultAjaxBehavior() > >> > > { > >> > > protected void respond(final AjaxRequestTarget target) > >> > > { > >> > > LOGGER.debug("Received a request from client to get the > >> > encryption key"); > >> > > target.add(new Label("foo", "Yeah I was just called from > >> > Javascript!")); > >> > > } > >> > > > >> > > public void renderHead(Component component, IHeaderResponse > >> response) > >> > > { > >> > > super.renderHead(component, response); > >> > > String callbackUrl = getCallbackUrl().toString(); > >> > > response.render(JavaScriptHeaderItem.forScript("var > >> > callbackUrl='" + callbackUrl + "';", "values")); > >> > > } > >> > > }; > >> > > > >> > > This callback url got rendered in the page like this: > >> > > >> > <script id="values" type="text/javascript"> > >> > > /*<![CDATA[*/ > >> > > var callbackUrl='./wicket/page?0-1.IBehaviorListener.0-'; > >> > > /*]]>*/ > >> > > </script> > >> > > > >> > > >> > > >> > And here is my JavaScript code: > >> > > >> > > var wcall = Wicket.Ajax.get({ u: '${callbackUrl}'}); > >> > > alert(wcall); > >> > > > >> > > But I'm getting the following error in the Wicket Ajax Debug Window: > >> > > >> > *An error occurred while executing Ajax request:TypeError: a is > >> undefined* > >> > > > >> > > >> > Can someone point out what's the mistake here? > >> > > >> > -- > >> > Thanks & regards > >> > James > >> > > >> > > > > > > > > -- > > Thanks & regards > > James Selvakumar > > > > > > -- > Thanks & regards > James >
