Apace Wicket Quick Tip
If you are working with multiple AjaxEventBehavior‘s (like AjaxFormSubmitBehavior and AjaxFormValidatingBehavior) on similar components in a Page and you are using IHeaderResponse.renderJavaScript(CharSequence) it’s possible you are contributing duplicate JavaScript over and over again to the header section of your Page unecessarily.
As it turns out, by simply changing to use the IHeaderResponse.renderJavaScript(CharSequence,String) method (providing a String ID for your JavaScript code), the default implementation of IHeaderResponse in Wicket will ignore duplicates automatically for you, keeping your pages more trim.
