I am trying to implement jQuery with PrimeFaces and JSF components, but it's not working properly. When I tried to do the same with HTML tags it;s working properly.
Here is the code with HTML tags which works properly with jQuery:
<input type="checkbox" id="check2"></input>
<h:outputText value="Check the box, if your permanent address is as same as current address."></h:outputText>
<h:message for="checkbox" style="color:red" />
with
$("#check2").change(function() {
if ($("#check2").is(":checked")) {
$("#p2").hide();
} else {
$("#p2").show();
}
});
Here is the code with PrimeFaces/JSF which doesn't work properly with jQuery:
<p:selectManyCheckbox >
<f:selectItem itemLabel="1" value="one" id="rad" ></f:selectItem>
</p:selectManyCheckbox>
with
$("#rad").change(function() {
if ($("#rad:checked").val() == "one") {
$("#p2").hide();
} else {
$("#p2").show();
}
});
You should realize that jQuery works with the HTML DOM tree in the client side. jQuery doesn't work directly on JSF components as you've written in the JSF source code, but jQuery works directly with the HTML DOM tree which is generated by those JSF components. You need to open the page in webbrowser and rightclick and then View Source. You'll see that JSF prepends the ID of the generated HTML input elements with the IDs of all parent NamingContainer components (such as <h:form>, <h:dataTable>, etc) with : as default separator character. So for example
<h:form id="foo">
<p:selectManyCheckbox id="bar" />
...
will end up in generated HTML as
<form id="foo" name="foo">
<input type="checkbox" id="foo:bar" name="foo:bar" />
...
You need to select elements by exactly that ID instead. The : is however a special character in CSS identifiers representing a pseudo selector. To select an element with a : in the ID using CSS selectors in jQuery, you need to either escape it by backslash or to use the [id=...] attribute selector or just use the old getElementById():
var $element1 = $("#foo\\:bar");
// or
var $element2 = $("[id='foo:bar']");
// or
var $element3 = $(document.getElementById("foo:bar"));
If you see an autogenerated j_idXXX part in the ID where XXX represents an incremental number, then you must give the particular component a fixed ID, because the incremental number is dynamic and is subject to changes depending on component's physical position in the tree.
As an alternative, you can also just use a class name:
<x:someInputComponent styleClass="someClassName" />
which ends up in HTML as
<input type="..." class="someClassName" />
so that you can get it as
var $elements = $(".someClassName");
This allows for better abstraction and reusability. Surely those kind of elements are not unique. Only the main layout elements like header, menu, content and footer are really unique, but they are in turn usually not in a NamingContainer already.
As again another alternative, you could just pass the HTML DOM element itself into the function:
<x:someComponent onclick="someFunction(this)" />
function someFunction(element) {
var $element = $(element);
// ...
}
See also:
How can I know the id of a JSF component so I can use in Javascript
How to use JSF generated HTML element ID with colon ":" in CSS selectors?
By default, JSF generates unusable IDs, which are incompatible with the CSS part of web standards
Integrate JavaScript in JSF composite component, the clean way
You also can use the jQuery "Attribute Contains Selector" (here is the url http://api.jquery.com/attribute-contains-selector/)
For example If you have a
<p:spinner id="quantity" value="#{toBuyBean.quantityToAdd}" min="0"/>
and you want to do something on its object you can select it with
jQuery('input[id*="quantity"]')
and if you want to print its value you can do this
alert(jQuery('input[id*="quantity"]').val());
In order to know the real html tag of the element you can always look at the real html element (in this case spinner was translated into input) using firebug or ie developer tools or view source...
Daniel.
If you're using RichFaces you can check rich:jQuery comonent. It allows you to specify server side id for jQuery component. For example, you have component with specified server id, then you can apply any jQuery related stuff to in next way:
<rich:jQuery selector="#<server-side-component-id>" query="find('.some-child').removeProp('style')"/>
For more info, please check doumentation.
Hope it helps.
look this will help you when i select experience=Yes my dialoguebox which id is dlg3 is popup.and if value is No it will not open
Related
Problem: Sometimes you will want to access a component from javascript with
getElementById, but id's are generated dynamically in JSF, so you
need a method of getting an objects id. I answer below on how you can do this.
Original Question:
I want to use some code like below. How can I reference the inputText JSF component in my Javascript?
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
<head>
<title>Input Name Page</title>
<script type="javascript" >
function myFunc() {
// how can I get the contents of the inputText component below
alert("Your email address is: " + document.getElementById("emailAddress").value);
}
</script>
</head>
<h:body>
<f:view>
<h:form>
Please enter your email address:<br/>
<h:inputText id="emailAddresses" value="#{emailAddresses.emailAddressesStr}"/>
<h:commandButton onclick="myFunc()" action="results" value="Next"/>
</h:form>
</f:view>
</h:body>
</html>
Update: this post Client Identifiers in JSF2.0 discusses using a technique like:
<script type="javascript" >
function myFunc() {
alert("Your email address is: " + document.getElementById("#{myInptTxtId.clientId}").value);
}
</script>
<h:inputText id="myInptTxtId" value="backingBean.emailAddress"/>
<h:commandButton onclick="myFunc()" action="results" value="Next"/>
Suggesting that the attribute id on the inputText component
creates an object that can be accessed with EL using #{myInptTxtId},
in the above example. The article goes on to state that JSF 2.0 adds
the zero-argument getClientId() method to the UIComponent class.
Thereby allowing the #{myInptTxtId.clientId} construct suggested
above to get the actual generated id of the component.
Though in my tests this doesn't work. Can anyone else confirm/deny.
The answers suggested below suffer from drawback that the above
technique doesn't. So it would be good to know if the above technique
actually works.
You need to use exactly the ID as JSF has assigned in the generated HTML output. Rightclick the page in your webbrowser and choose View Source. That's exactly the HTML code which JS sees (you know, JS runs in webbrowser and intercepts on HTML DOM tree).
Given a
<h:form>
<h:inputText id="emailAddresses" ... />
It'll look something like this:
<form id="j_id0">
<input type="text" id="j_id0:emailAddress" ... />
Where j_id0 is the generated ID of the generated HTML <form> element.
You'd rather give all JSF NamingContainer components a fixed id so that JSF don't autogenerate them. The <h:form> is one of them.
<h:form id="formId">
<h:inputText id="emailAddresses" value="#{emailAddresses.emailAddressesStr}"/>
This way the form won't get an autogenerated ID like j_id0 and the input field will get a fixed ID of formId:emailAddress. You can then just reference it as such in JS.
var input = document.getElementById('formId:emailAddress');
From that point on you can continue using JS code as usual. E.g. getting value via input.value.
See also:
How to select JSF components using jQuery?
Update as per your update: you misunderstood the blog article. The special #{component} reference refers to the current component where the EL expression is been evaluated and this works only inside any of the attributes of the component itself. Whatever you want can also be achieved as follows:
var input = document.getElementById('#{emailAddress.clientId}');
with (note the binding to the view, you should absolutely not bind it to a bean)
<h:inputText binding="#{emailAddress}" />
but that's plain ugly. Better use the following approach wherein you pass the generated HTML DOM element as JavaScript this reference to the function
<h:inputText onclick="show(this)" />
with
function show(input) {
alert(input.value);
}
If you're using jQuery, you can even go a step further by abstracting them using a style class as marker interface
<h:inputText styleClass="someMarkerClass" />
with
$(document).on("click", ".someMarkerClass", function() {
var $input = $(this);
alert($input.val());
});
Answer: So this is the technique I'm happiest with. Doesn't require doing too much weird stuff to figure out the id of a component. Remember the whole point of this is so you can know the id of a component from anywhere on your page, not just from the actual component itself. This is key. I press a button, launch javascript function, and it should be able to access any other component, not just the one that launched it.
This solution doesn't require any 'right-click' and see what the id is. That type of solution is brittle, as the id is dynamically generated and if I change the page I'll have to go through that nonsense each time.
Bind the component to a backing bean.
Reference the bound component wherever you want.
So here is a sample of how that can be done.
Assumptions: I have an *.xhtml page (could be *.jsp) and I have defined a backing bean. I'm also using JSF 2.0.
*.xhtml page
<script>
function myFunc() {
var inputText = document.getElementById("#{backBean.emailAddyInputText.clientId}")
alert("The email address is: " + inputText.value );
}
</script>
<h:inputText binding="#{backBean.emailAddyInputText}"/>
<h:commandButton onclick="myFunc()" action="results" value="Next"/>
BackBean.java
UIInput emailAddyInputText;
Make sure to create your getter/setter for this property too.
Id is dynamically generated, so you should define names for all parent elements to avoid j_id123-like ids.
Note that if you use jQuery to select element - than you should use double slash before colon:
jQuery("my-form-id\\:my-text-input-block\\:my-input-id")
instead of:
jQuery("my-form-id:my-text-input-block:my-input-id")
In case of Richfaces you can use el expression on jsf page:
#{rich:element('native-jsf-input-id')}
to select javascript element, for example:
#{rich:element('native-jsf-input-id')}.value = "Enter something here";
You can view the HTML source when this is generated and see what the id is set to, so you can use that in your JavaScript. As it's in a form it is probably prepending the form id to it.
I know this is not the JSF way but if you want to avoid the ID pain you can set a special CSS class for the selector. Just make sure to use a good name so that when someone reads the class name it is clear that it was used for this purpose.
<h:inputText id="emailAddresses" class="emailAddressesForSelector"...
In your JavaScript:
jQuery('.emailAddressesForSelector');
Of course you would still have to manually manage class name uniqueness.
I do think this is maintainable as long as you do not use this in reusable components. In that case you could generate the class names using a convention.
<h:form id="myform">
<h:inputText id="name" value="#{beanClass.name}"
a:placeholder="Enter Client Title"> </h:inputText>
</h:form>
This is a small example of jsf. Now I will write javascript code to get the value of the above jsf component:
var x = document.getElementById('myform:name').value; //here x will be of string type
var y= parseInt(x,10); //here we converted x into Integer type and can do the
//arithmetic operations as well
I don't understand why this piece of code is working:
<h:link value="Login" rendered="#{sessionBean.userInSessionBean == null}" />
and this piece of code is not working:
<a jsf:rendered="#{sessionBean.userInSessionBean == null}">Login</a>
A HTML element will only become a passthrough element if following conditions are met:
There's at least one jsf:xxx attribute from http://xmlns.jcp.org/jsf namespace.
There's at least one "identifying attribute" associated with a specific JSF component.
For the <a> element an identifying attribute is necessary so JSF can decide whether to interpret it as <h:commandLink>, <h:outputLink> or <h:link>. Without an identifying attribute, JSF wouldn't have any idea what component you actually meant to use, so any jsf:xxx attributes will be ignored. The jsf:rendered is not sufficient as identifying attribute because it appears on every single JSF component, so JSF would still have no idea which one you meant.
Given that you seem to intend to have a <h:link>, then use jsf:outcome as identifying attribute.
<a jsf:outcome="login" jsf:rendered="#{empty sessionBean.userInSessionBean}">Login</a>
A completely different alternative is to wrap plain HTML in an <ui:fragment rendered>. See also How to conditionally render plain HTML elements like <div>s?
I'm trying to call a managed bean from h:commandLink in JSF. But I don't see href attribute in the rendered HTML a tag.
Am I missing something?
There is a ManagedBean called AccountSetupController with a signUp method in it.
This is the tag I used in JSF:
<h:form prependId="false">
<h:commandLink action="#{accountSetupController.signUp()}"
value="#{msg['homepage.createaccount']}" styleClass="button large">
</h:commandLink>
</h:form>
This is the rendered tag. See there is nothing in href attribute.
<a href="#" onclick="mojarra.jsfcljs(document.getElementById('j_idt15'),
{'j_idt33':'j_idt33'},'');return false"
class="button large">CREATE MY ACCOUNT</a>
This is the form tag that is generated
<form id="j_idt15" name="j_idt15"
method="post" action="/myproject/faces/homepage/homepage.xhtml"
enctype="application/x-www-form-urlencoded"> .... </form>
As you can see, the form action is pointing to some place I don't need.
Am I missing something?
Command links in JSF are rendered that way. The form will be submitted by JSF via JavaScript's onclick method using JSF JS library, while the href will always stay #.
Moreover, you won't find the bound action / action listener method names in browser tools due to understandable reasons. Rather, JSF will find the id of a clicked link on the server and will trigger all of the component's action(listeners).
All in all, reading <h:commandLink> documentation unsurprisingly helps a lot (all emphasis mine):
General behavior: Both the encode and decode behavior require the ability to get the id/name for a hidden field, which may be rendered in markup or which may be programmatically added via client DOM manipulation, whose value is set by the JavaScript form submit (further referred to as hiddenFieldName.
Decode behavior: Obtain the "clientId" property of the component. Obtain the Map from the "requestParameterMap" property of the ExternalContext. Derive hiddenFieldName as above. Get the entry in the Map under the key that is the hiddenFieldName. If the there is no entry, or the entry is the empty String, or the entry is not equal to the value of the "clientId" property, return immediately. If there is an entry, and its value is equal to the value of the "clientId" property, create a new javax.faces.event.ActionEvent instance around the component and call queueActionEvent() on the component, passing the event.
Encode behavior: Render "#" as the value of the "href" attribute. Render the current value of the component as the link text if it is specified. Render JavaScript that is functionally equivalent to the following as the value of the "onclick" attribute: document.forms['CLIENT_ID']['hiddenFieldName'].value='CLIENT_ID'; ocument.forms['CLIENT_ID']['PARAM1_NAME'].value='PARAM1_VALUE'; document.forms['CLIENT_ID']['PARAM2_NAME'].value='PARAM2_VALUE'; return false; document.forms['CLIENT_ID'].submit()" where hiddenFieldName is as described above, CLIENT_ID is the clientId of the UICommand component, PARAM*_NAME and PARAM*_VALUE are the names and values, respectively, of any nested UIParameter children.
We have an accessibility requirement to render certain command links with additional "off screen" text for screen readers. So we want to end up rendering something like (attributes omitted for clarity)
<a>Edit Details<span class="hiddenOffScreen"> for John Smith</span></a>
The problem is the standard jsf1.2 <h:commandLink> tag does not respect the escape attribute. I tried something like <h:commandLink escape="false" value="#{linkText}"/> where linkText evaluates to the contents of the a tag shown above but this renders the span tag literally (i.e escapes the < and >)
How best to go about meeting this requirement? I can of course easily add the span later with JQuery however, for my own education I'd like to have a try with a custom renderer - but not sure how I would hook in with the existing default renderer which adds the "onClick" event handler and associated javascript. My google-foo seems to have failed me when searching for custom commandLink renderer.
Bear in mind, this is JSF 1.2 and we cannot use any third party tag libraries as we're running on a braindead very old version of WebSphere Portal Server.
You can nest content, including other tags and/or implicit text, within the <h:commandLink> tag, instead of specifying text within its value attribute, to achieve your functionality:
<h:commandLink ...>
<h:outputText .../>
<span class="hidden"></span>
#{bean.someText}
</h:commandLink>
This will render exactly what you want.
Use < or > to write < >
I would like to find out how to set the default value for the textbox field in JSF, the field will be empty onFocus. If the user does not enter any value it will again show the default value.
I was able to find the solution using JS with regular html textbox but could not find anything Using JSF.
<h:inputText id="DT_INPUT" value="#{examplebean.date}" maxlength="11" size="10" />
something like
<h:inputText id="DT_INPUT" value="dd-MMM-yyyy" maxlength="11" size="10" />
but how to tie the actual value back to the bean?
Thanks,
Sai.
I would recommend you to look at some component libraries which already have components with necessary functionality. As I understand it's a jsf way. Here is an example of input text with hint.
PrimeFaces has a watermark component;
http://www.primefaces.org/showcase/ui/watermark.jsf
As a completely different alternative without the need for component libraries, you could also achieve this with just a h:outputLabel and a good shot of CSS/JS.
JSF:
<h:form id="form">
<h:outputLabel for="inputId" value="dd-MM-yyyy" />
<h:inputText id="inputId" value="#{bean.date}" />
</h:form>
CSS:
#form label {
position: absolute;
cursor: text;
color: gray;
padding: 2px;
}
JS (actually using jQuery since it insanely eases DOM traversion and manipulation):
$(document).ready(function() {
$('#form input').focus(function() {
$('label[for=' + $(this).attr('id') + ']').hide();
}).blur(function() {
if (!$(this).val().length) $('label[for=' + $(this).attr('id') + ']').show();
});
});
Here's a live demo (based on plain HTML).
you can set an initial value to examplebean.date (in the java code or the bean), and it will appear in the text field
what works with plain html, works with jsf as well, because it's transformed into html
for date components, look at richfaces, primefaces, icefaces, trinidad, etc for ready-to-use calendar components.
If I understand your question correctly, your example works okay as JSF. The tag h: implies that you are using JSF already.
In JSF , The Screen components (in HTML Terms - Input Controls) are bound to a java class properties (or Attributes) , When the JSF Page is rendered (Please refer to Debug JSF Life Cycle ), the default or the manually set values are set (if request scoped).
The values are set and retrieved using Java Expression Language.
In your example, value="#{examplebean.date}" , examplebean is your bean (which you should have configured in your faces-config) and date is the attribute (for which you will have a corresponding setter and getter) - accessing the java class properties at run time is the biggest advantage of Expression Language.
Refer BalusC Posts, Get JSF API's , Expression Language in Sun sites.