Page History

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• java.util.Optional for AjaxFallback**
• new DateTime APIs for wicket-datetime
• Lambda API for Listeners (onClick, etc.)

AppCache for Offline-Support (in dev https://github.com/klopfdreh/wicket-components-playground/wiki/20.-HTML5-OfflineMode with ServiceWorker)

• http://www.html5rocks.com/de/tutorials/appcache/beginner/
• http://www.w3.org/TR/2011/WD-html5-20110525/offline.html

Better monitoring (in dev https://github.com/klopfdreh/wicket/tree/wicket_metrics)

Expose hooks for better monitoring.

For example an integration with something like https://dropwizard.github.io/metrics/3.1.0/

Better SEO for stateful pages

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