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PrimeFaces Cookbook by Mert Çalışkan, Oleg Varaksin

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AJAX basics with Process and Update

PrimeFaces provides a partial page rendering (PPR) and view-processing feature based on standard JSF 2 APIs to enable choosing what to process in the JSF lifecycle and what to render in the end with AJAX. PrimeFaces AJAX Framework is based on standard server-side APIs of JSF 2. On the client side, rather than using the client-side API implementations of JSF implementations, such as Mojarra and MyFaces, PrimeFaces scripts are based on the jQuery JavaScript library.

How to do it...

We can create a simple page with a command button to update a string property with the current time in milliseconds on the server side and an output text to show the value of that string property, as follows:

<p:commandButton update="display" ...

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