Our experience with facelets shows that when you're designing JSF Tutorial - JSF Conditional Navigation Example « Previous; Next » With managed bean we can control the navigation based on a condition. Not having much knowledge about JavaScript, I was not able to clearly understand this. id="#{id}" Put it in WEB-INF if you are just putting the facelets straight into your war. … I do not want to use JSTL tags in my facelets because JSTL tags won't follow the JSF lifecycle. -->       Download JSF Facelet Tags Example Project.     The opinions expressed herein are our own personal opinions and do not represent They can be defined in managed beans.           JSF provides special tags to create common layout for a web application called facelets tags. To workaround the problem you should prevent null to "" conversion in the EL. I want to implement if else feature in facelets without calling my backing bean method twice. I even read in the articles that using JSTL with JSF is not a good idea. value - a data binding; : 4: Create UserData.java as a managed bean under package com.tutorialspoint.test as explained below. A composition defines a JSF UIComponents structure in a Facelets page. These templates can be overridden to accumulate custom dynamic content with the same layout. xmlns:ui="http://java.sun.com/jsf/facelets" Defines a composition that optionally uses a template, as outlined in the description of the ui tag library. Be sure, this won't work either (it may work but not as you would expect). Doing so will mean the EJB does less work. If the collection is not empty, the Facelet will call the EJB a … Facelets is a templating fra… If we consider an example where we want to access the cname of the car managed bean then we use the expression             A bit later: not everything works as we expected. generate element with or without id, or define class/style if value is specified. A good catch. So, in other words, my first suspicion is that your property is not being properly exposed to JSF and therefore JSF assumes that its value is always false. Part of JournalDev IT Services Private Limited. onchange="#{onchange}" xmlns:c="http://java.sun.com/jstl/core"   How to create a dynamic JSF data table with a facelet page ? The JavaServer Faces specification defines the lifecycle of a JavaServer Faces application.           string is not valid id". Click on Validate   value="#{value}" JSF EL – Referring object properties using value expressions To access the managed bean properties, elements in a collection or implicit objects we use . 8 Introduction to Facelets. The term Facelets refers to the view declaration language for JavaServer Faces technology. Trying to combine JSF and JSP is like trying to shoehorn a foot into a glove: it's possible, but it's really just a stopgap measure until something better comes along. style="#{style}"     – Mike Braun Dec 19 '11 at 9:53. add a comment | 6. values).