call javascript from managed bean

Question

I want to clear form hidden value in JSF page from managedbean class .so i used to call a method in that i used this code to call javascript but it throws java.lang.NullPointerException below is the code.

FacesContext facesContext = FacesContext.getCurrentInstance();
    ExtendedRenderKitService service = 
              Service.getRenderKitService(facesContext, ExtendedRenderKitService.class);
            service.addScript(facesContext, "alert('foo');");

the error is thrown in the line where alert is called .can someone help me please.even i tried to call a function in JSF page to reset values...it gave me same error.

@kocko In last line service.addScript(facesContext, "alert('foo');");..when i call javascript. — user2644886, Oct 11 '13 at 09:33
Not enough information. I am assuming that you are working with ADF / Trinidad. Can you provide details of how the form field is setup in your page? You can probably look at a simple solution like setting a partial trigger or adding the component from the managed bean code itself. — Harsha R, Oct 11 '13 at 10:28
@user2644886........I guess you have to cast it as `ExtendedRenderKitService` Class as shown in this example.http://svn.apache.org/repos/asf/myfaces/trinidad/trunk/trinidad-examples/trinidad-blank/src/main/java/org/apache/myfaces/trinidad/blank/HelloWorldBacking.java — SRy, Oct 11 '13 at 13:10

score 1 · Answer 1 · edited May 23 '17 at 12:15

1

if you use primefaces,you can use Request Context component of primefaces.

RequestContext

if you dont want ,you can check this out

without primefaces

edited May 23 '17 at 12:15

Community

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answered Oct 11 '13 at 15:14

mstzn

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JS is not executed – GlacialMan Mar 31 '20 at 10:30

score 0 · Answer 2 · answered Apr 06 '16 at 06:06

0

RequestContext.getCurrentInstance().execute("jsMethod();");

RequestContext.getCurrentInstance().execute("$('#ID').hide();");

RequestContext.getCurrentInstance().execute("PF('WIDGET').show();");

You can execute any javascript/jquery/primefaces code inside execute method.

answered Apr 06 '16 at 06:06

Sanketik Gote

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JS is not executed – GlacialMan Mar 31 '20 at 10:30

score -1 · Answer 3 · edited Jun 19 '14 at 04:48

-1

You can use Request Context component of primefaces

edited Jun 19 '14 at 04:48

Infinite Recursion

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answered Jun 19 '14 at 04:21

Achmad Hanafi

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call javascript from managed bean

3 Answers3