How would I call a JavaScript function from a JSF Bean?

Question

I need to do this from Java code, I was trying the following, but got stuck:

    UIOutput js = new UIOutput();
    js.setRendererType("javax.faces.resource.Script");
    js.getAttributes().put("library", "js");
    js.setValue("alert(123);");

    FacesContext context = FacesContext.getCurrentInstance();
    context.getViewRoot().addComponentResource(context, js, "body");

I didn't get an error with this in the server log, but also didn't see the alert.

Any idea?

EDIT: I tried the suggested solution, the alleged duplicate, and I didn't get a server error either, but neither did I see any alert..

@Tiny because he tried to create something that would dynamically run a script — Kukeltje
– Kukeltje, Commented Apr 1, 2015 at 19:01
possible duplicate of Initiating JavaScript call from server side — kolossus
– kolossus, Commented Apr 1, 2015 at 21:36

Community · Accepted Answer · 2017-05-23 10:28:01Z

2

I'm assuming you want to do this from a JSF ManagedBean, not a JSF Component.

I'm not sure there is a 'plain' jsf solution for this (meaning not adding another framework or creating and maintaining some specific java code).

There are at least 2 solutions (the ones I worked with):

I'm sure all other component suites (RichFaces, IceFaces, OpenFaces, ...) have some similar solution.

If you want to stay using plain JSF, I'd go for using OmniFaces. It's a great addition in general and prevents you from maintaining knowledge about implementation specifics.

Edit: I just found a plain jsf solution

edited May 23, 2017 at 10:28

CommunityBot

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answered Apr 1, 2015 at 14:00

Kukeltje

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6 Comments

user777 Over a year ago

Thanks! Actually I'm using RichFaces, I will google for something similar there!

user777 Over a year ago

There doesn't seem to be something similar in RichFaces, do you know anything?

user777 Over a year ago

I tried that, but I'm getting an

JSF AJAX Error: description: "An empty response was received from the server.  Check server error logs.", responseCode: 200, responseText: "<?xml version='1.0' encoding='UTF-8'?>↵<partial-response><changes><eval><![CDATA[alert(123);]]></eval>", responseXML: null

and I don't see the alert

Kukeltje Over a year ago

Then I think your richfaces ajax response handler does not seem to support this and I'm out of suggestions.

Kukeltje Over a year ago

Although, you could try to add a dummy update to 'satisfy' the ajax response handler and parse the response yourself and 'eval' the javascript part

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bfontaine · Accepted Answer · 2015-11-17 11:05:37Z

-1

Please try this:

JavaScriptRunner.runScript(FacesContext.getCurrentInstance(), "alert(hello)");

edited Nov 17, 2015 at 11:05

bfontaine

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answered Nov 17, 2015 at 10:09

blaybel

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Comments

Sahil Mahajan Mj · Accepted Answer · 2018-12-27 07:24:56Z

-1

I don't know my version. But I tried the follows and it works in my environment

FacesContext.getCurrentInstance().getResponseWriter().write("<script>alter('hello');</script>");

edited Dec 27, 2018 at 7:24

Sahil Mahajan Mj

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answered Dec 27, 2018 at 5:07

ken

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