Execute JavaScript after every JSF ajax postback
You could register it as JSF ajax callback handler by jsf.ajax.addOnEvent:
<script> jsf.ajax.addOnEvent(foo);</script>with
<script> function foo(data) { var ajaxStatus = data.status; // Can be "begin", "complete" and "success". switch (ajaxStatus) { case "begin": // Right before sending ajax request. // ... break; case "complete": // Right after receiving ajax response. // ... break; case "success": // When ajax response is successfully processed. // ... break; } }</script>where the data object has several useful XHR derived properties which is described in table 14-4 of JSF 2.0 specification (click the For Evaluation link). Here's an extract of relevance:
TABLE 14-4 Event Data Payload
Name Description/Value ------------- ---------------------------------------------------- type “event” status One of the events specified in TABLE 14-3 source The DOM element that triggered the Ajax request. responseCode Ajax request object ‘status’ (XMLHttpRequest.status); Not present for “begin” event; responseXML The XML response (XMLHttpRequest.responseXML); Not present for “begin” event; responseText The text response (XMLHttpResponse.responseTxt); Not present for “begin” event;
As an alternative, a XHTML-declarative way would be to just embed the script call in a JSF component with an id and let the ajax call re-render it. The component should in turn render the script conditionally based on FacesContext#isPostback().
<h:form> <h:commandButton value="Submit" action="#{bean.submit}"> <f:ajax render=":myscript"> </h:commandButton></h:form><h:panelGroup id="myscript"> <h:outputScript rendered="#{facesContext.postback}">foo();</h:outputScript></h:panelGroup>Most component libraries have however better abstracted support for this. Since you didn't mention which one you're using so that a more suited answer can be given, here's just a random example based on PrimeFaces command button.
<p:commandButton value="Submit" action="#{bean.submit}" oncomplete="foo();" />Refer the documentation of the component library you're using.