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By now I expect that most Web Developers have heard of Ajax, if not I highly recommend you read through the preceding link. In short Ajax is a way to do dynamic Web applications without the browser round-trip (now the round-trip is done through JavaScript).

We have some industrious folks in Tapestry-land who have started implementing some Ajax-style components for use in your Tap applications.

• XTile - A component providing the required JavaScript to pass some information to the server and receive its response without reloading the page (Ajax)
• Ajax Demo - Dynamically searches Yahoo as you type (Live Demo)
• LiveTextField - This component aims to reproduce the behaviour of the google suggest tool bar.
• Tacos Tree - Has support for partial form posting through JavaScript (Live Demo)

We will be delving into Ajax (probably after the initial release is made) as part of the enhancements to our application. Other Ajax components we will probably need to create include:

• Yellow Fade Technique - The YFT uses JavaScript to create a yellow highlight that briefly spotlights the change when the page reloads. Then, in a second or two, the highlight fades and the page reverts to its normal state.
• Google Suggest (using Lucene) - What will your search return, Google Suggest tells you (and this component might also ;-).
• GMail collapsing trees - Basically a dynamic tree that collapses without sending a full-blown request back to the server