jsf javascript ajax jquery

Bean.java

FacesContext f = FacesContext.getCurrentInstance();
String viewState = f.getApplication().getStateManager().getViewState(f)

jsf-ajax.js

$.ajax({
    type : "POST",
    url : "http://localhost:8080/web/index.xhtml",
    headers : {
        "Faces-Request" : "partial/ajax"
    },
    data : {
        "javax.faces.ViewState" : "#{bean.viewState}",
        "javax.faces.partial.render" : "jsf-element-id-to-render-response",
        "javax.faces.partial.ajax" : true
    }
}).done(function(e) {
    console.log("done", e);
}).fail(function(e) {
    console.log("fail", e);
});