JSF - h:inputHidden

Quiz

The h:inputHidden tag renders an HTML input element of the type "hidden".

JSF Tag

<h:inputHidden value = "Hello World" id = "hiddenField" />

Rendered Output

<input id = "jsfForm:hiddenField" type = "hidden" name = "jsfForm:hiddenField"  
   value = "Hello World" />

Tag Attributes

S.No	Attribute & Description
1	id Identifier for a component
2	binding Reference to the component that can be used in a backing bean
3	rendered A boolean; false suppresses rendering
4	styleClass Cascading stylesheet (CSS) class name
5	value A components value, typically a value binding
6	valueChangeListener A method binding to a method that responds to value changes
7	converter Converter class name
8	validator Class name of a validator thats created and attached to a component
9	required A boolean; if true, requires a value to be entered in the associated field
10	accesskey A key, typically combined with a system-defined metakey, that gives focus to an element
11	accept Comma-separated list of content types for a form
12	accept-charset Comma- or space-separated list of character encodings for a form. The accept-charset attribute is specified with the JSF HTML attribute named acceptcharset.
13	cols Number of columns
14	border Pixel value for an elements border width
15	charset Character encoding for a linked resource
16	coords Coordinates for an element whose shape is a rectangle, circle, or polygon
17	dir Direction for text. Valid values are ltr (left to right) and rtl (right to left).
18	disabled Disabled state of an input element or button
19	hreflang Base language of a resource specified with the href attribute; hreflang may only be used with href.
20	lang Base language of an elements attributes and text
21	rows Number of rows
22	readonly Read-only state of an input field; the text can be selected in a readonly field but not edited
23	style Inline style information
24	tabindex Numerical value specifying a tab index
25	target The name of a frame in which a document is opened
26	title A title, used for accessibility, that describes an element. Visual browsers typically create tooltips for the titles value
27	type Type of a link; for example, stylesheet
28	width Width of an element
29	onblur Element loses focus
30	onchange Elements value changes
31	onclick Mouse button is clicked over the element
32	ondblclick Mouse button is double-clicked over the element
33	onfocus Element receives focus
34	onkeydown Key is pressed
35	onkeypress Key is pressed and subsequently released
36	onkeyup Key is released
37	onmousedown Mouse button is pressed over the element
38	onmousemove Mouse moves over the element
39	onmouseout Mouse leaves the element’s area
40	onmouseover Mouse moves onto an element
41	onmouseup Mouse button is released
42	onreset Form is reset
43	onselect Text is selected in an input field
44	immediate Process validation early in the life cycle

Example Application

Let us create a test JSF application to test the above tag.

Step	Description
1	Create a project with a name helloworld under a package com.tutorialspoint.test as explained in the JSF - First Application chapter.
2	Modify home.xhtml as explained below. Keep rest of the files unchanged.
3	Compile and run the application to make sure business logic is working as per the requirements.
4	Finally, build the application in the form of war file and deploy it in Apache Tomcat Webserver.
5	Launch your web application using appropriate URL as explained below in the last step.

home.xhtml

<!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">
   <head>
      <title>JSF Tutorial!</title>
      <h:head>
         
         <script type = "text/javascript">
            function showHiddenValue() { 
               alert(document.getElementById('jsfForm:hiddenField').value);	 
            }
         </script>
      </h:head>
   </head>
   
   <body>
      <h2>h:inputHidden example</h2>
      <hr />
      
      <h:form id = "jsfForm">
         <h3>Get value from inputHidden field</h3>
         <h:inputHidden value = "Hello World" id = "hiddenField" />
         <h:commandButton value = "Show Hidden Value" onclick = "showHiddenValue()" />
      </h:form> 
   
   </body>
</html>

Once you are ready with all the changes done, let us compile and run the application as we did in JSF - Create Application chapter. If everything is fine with your application, this will produce the following result.

jsf_basic_tags.htm

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