invoke a managed bean to execute JavaScript code

I am facing an issue while trying to clear a hidden form value in a JSF page from a managed bean class. I tried calling a method where I used the following code snippet to call JavaScript, but unfortunately it throws a java.lang.NullPointerException. The code that caused the error is shown below:

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

The error occurs at the line where the alert function is called. Can someone please assist me with this issue? I also attempted to call a function on the JSF page to reset values, but encountered the same error.

javajavascriptjsf-2

Answer №1

When leveraging PrimeFaces, the RequestContext component can be utilized for various functionalities.

RequestContext Documentation

If PrimeFaces is not preferred, an alternative solution can be found by visiting this resource.

JavaScript Function without PrimeFaces

Answer №2

Execute the "jsMethod();" function using the RequestContext.getCurrentInstance() method.


Hide the element with ID '#ID' using the execute method.

Show the widget named 'WIDGET' by executing javascript code within the execute method.

Feel free to run any custom javascript, jquery, or PrimeFaces code inside the execute method.

Answer №3

To implement this feature, try utilizing the RequestContext component by PrimeFaces

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