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Mastering JavaServer Faces 2.2 by Anghel Leonard

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Explicit loading of jsf.js

The AJAX mechanism used by JSF is encapsulated in a JavaScript file, named jsf.js. This file is available in the javax.faces library. When we are using <f:ajax>, this file is loaded behind the scene without any explicit requirements.

However, jsf.js can be loaded explicitly with any of the following methods:

  • Using the <h:outputScript> component as follows:
    <h:outputScript name="jsf.js" library="javax.faces" target="head"/>
  • Using the @ResourceDependency keyword as follows:
    @ResourceDependency(name="jsf.js" library="javax.faces" target="head")

Focusing on <h:outputScript>, you can attach AJAX to a component as shown in the following example code:

<h:form prependId="false">             
  <h:outputScript name="jsf.js" library
="javax.faces" ...

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