Facelets UI Tag Reference

10. Facelets UI Tag Reference

ui:debug

The UI Debug tag allows you to display helpful information about the JSF component tree and scoped variables in your browser when you test your JSF pages. The hotkey attribute specifies a key combination (CTRL + SHIFT + D is the default value) to display the popup window containing the information. The UI Debug tag can be enabled or disabled by setting the rendered attribute.

Composition Template with Debug

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" 
      xmlns:h="http://java.sun.com/jsf/html" 
      xmlns:ui="http://java.sun.com/jsf/facelets">
<h:head>
<title><ui:insert name="title" /></title>
</h:head>
<body>
<h2>
	<ui:insert name="header" />
</h2>
<ui:insert name="message" />
<ui:debug rendered="#{initParam['javax.faces.PROJECT_STAGE'] eq 'Development'}" 
          hotkey="0" />
</body>
</html>

This example was formatted by JSFToolbox for Dreamweaver.

Rendered Output

Tag Attributes

hotkey	Text

Defines a single character, that, pressed in conjunction with CTRL and SHIFT, will display the JSF debug window. By default, the hotkey is 'd'. The value for the hotkey attribute cannot be an EL expression.

rendered	Text

Controls whether the debug component is rendered. Valid values for this attribute are either the strings "true" or "false" or an EL expression that evaluates to either "true" or "false". If this attribute's value is "false" or the value is an EL expression that evaluates to "false", the debug component is not rendered in the page, the hotkey attribute is disregarded, and users cannot open the debugging information window with a hotkey.

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10. Facelets UI Tag Reference

ui:debug

Tag Attributes

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