Execute managebean method from javascript onload event

Solution 1:

In theory the following should do it.

<h:body>
    <f:ajax event="load" listener="#{bean.onload}" />
</h:body>

with

public void onload(AjaxBehaviourEvent event) {
    // ...
}

However, this is not supported for some reason. I've ever posted an issue report about that.

The following works, but it's in essence a hack.

<h:head>
    <title>JSF 2.0 onload hack</title>
    <script>
        window.onload = function() {
            document.getElementById('hidden:link').onclick();
        }
    </script>
</h:head>
<h:body>
    <h:form id="hidden" style="display:none">
        <h:commandLink id="link">
            <f:ajax event="click" listener="#{bean.onload}" />
        </h:commandLink>
    </h:form>
</h:body>

If you happen to use PrimeFaces, then you can use its <p:remoteCommand> with autoRun set to true.

<h:body>
    <h:form>
        <p:remoteCommand name="onload" action="#{bean.onload}" autoRun="true" />
    </h:form>
</h:body>

Or if you're using OmniFaces, then you can use its <o:commandScript>

<h:body>
    <h:form>
        <o:commandScript name="onload" action="#{bean.onload}" />
        <h:outputScript target="body">onload()</h:outputScript>
    </h:form>
</h:body>

The <h:outputScript target="body"> renders the <script> in the end of the <body>. The upcoming OmniFaces 2.2 will remove this need by new autorun attribute.

<h:body>
    <h:form>
        <o:commandScript name="onload" action="#{bean.onload}" autorun="true" />
    </h:form>
</h:body>

Solution 2:

in jsf2.0 you can use the f:ajax tag in almost any other jsf tag e.g

<h:selectOneRadio id="myComponent" value="#{someBean.inputMethod}">
<f:selectItem itemValue="#{someBean.A}" itemLabel="A" />
<f:selectItem itemValue="#{someBean.B}" itemLabel="B" />
       <f:ajax event="click" action=#{someBean.someMethod} />
</h:selectOneRadio>

In this example the someMethod is excuted in the javasript onClick event for the "myComponent" selectOneRadio

Not sure if this is what you are after ....

Execute managebean method from javascript onload event

Solution 1:

Solution 2:

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