define(["dojo/dom", "dojo/dom-class"], function(dom, domClass){ return { // view init init: function(){ }, beforeActivate: function(view, data){ // summary: // view life cycle beforeActivate() // this.previousView = view; var backButtomDom = dom.byId('headerBackButton'); domClass.remove(backButtomDom, "showOnPhone"); domClass.add(backButtomDom, "hide"); // setup code to watch for the navigation pane being visible }, beforeDeactivate: function(){ // summary: // view life cycle beforeActivate() // var backButtomDom = dom.byId('headerBackButton'); domClass.remove(backButtomDom, "hide"); domClass.add(backButtomDom, "showOnPhone"); } } });