JSF AJAX Update Manager FAQs

Question 1

Does the 'rendered' attribute work on standard

tags?

Accepted Answer

No. JSF ignores the 'rendered' attribute on plain HTML elements. To conditionally show/hide content during an AJAX update, you should use or .

Question 2

Why shouldn't I use plain HTML IDs for AJAX updates in JSF?

Accepted Answer

JSF cannot track or manipulate plain HTML elements during the AJAX lifecycle. You must use JSF components like h:panelGroup or p:outputPanel to ensure the server-side component tree stays in sync with the client-side DOM.

Question 3

How do I update a global Growl component from inside a form?

Accepted Answer

Use an absolute ID with a colon prefix (e.g., update=":growl") to escape the current naming container and locate the component at the root of the view.

Question 4

What is the best component for wrapping content to be updated via AJAX?

Accepted Answer

h:panelGroup is the most lightweight option for basic updates, while p:outputPanel offers more features like deferred loading and specific HTML tag rendering (div vs span).

Question 5

Can I use jQuery or CSS selectors in the update attribute?

Accepted Answer

This skill discourages the use of CSS selectors like @(.class) because they are less performant and more fragile than explicit IDs or using p:resolveFirstComponentWithId for server-side resolution.

JSF AJAX Update Manager

주요 기능

사용 사례

JSF AJAX Update Manager

주요 기능

사용 사례