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CHAPTER 6 STORING DATA IN THE BROWSERreturn Number(this.quantity()) + someOtherValue;Using Persistence in the Offline ApplicationNow that I have modified the view model, I can change the main document to improve the way that Ihandle the form element when the browser is offline. Listing 6-11 shows the changes to the HTMLmarkup.Listing 6-11. Adding Buttons That Handle the Form When the Browser Is Offline... $()($)Total:$...I have added a Save for Later button to the document, which is visible when the browser is offline. Ihave also changed the submit button so that it is visible only when the browser is online. Listing 6-12shows the corresponding changes to the script element.Listing 6-12. Changes to the script Element to Support Offline Formsvar cheeseModel = {154www.it-ebooks.info
CHAPTER 6 STORING DATA IN THE BROWSER};cache: {status: ko.observable(window.applicationCache.status),online: ko.observable(window.navigator.onLine)}$.getJSON("products.json", function(data) {cheeseModel.products = data;localStorage["jsondata"] = JSON.stringify(data);}).error(function() {if (localStorage["jsondata"]) {cheeseModel.products = JSON.parse(localStorage["jsondata"]);}}).complete(function() {$(document).ready(function() {if (cheeseModel.products) {enhanceViewModel();ko.applyBindings(cheeseModel);hasher.initialized.add(crossroads.parse, crossroads);hasher.changed.add(crossroads.parse, crossroads);hasher.init();crossroads.addRoute("category/:cat:", function(cat) {cheeseModel.selectedCategory(cat ||cheeseModel.products[0].category);});$('#buttonDiv input').button().click(function(e) {if (e.target.type == "button") {createDialog("Basket Saved for Later");} else {localStorage.clear();}});$('div.navSelectors').buttonset();$(window).bind("online offline", function() {cheeseModel.cache.online(window.navigator.onLine);});$(window.applicationCache).bind("checking noupdate downloading " +"progress cached updateready", function(e) {cheeseModel.cache.status(window.applicationCache.status);});$('div.tagcontainer a').button().filter(':not([href])').click(function(e) {e.preventDefault();if ($(this).attr("data-action") == "update") {window.applicationCache.update();} else {155www.it-ebooks.info
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Contents at a Glance• About the A
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CHAPTER 1 GETTING READYWhat Do You
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CHAPTER 1 GETTING READYChapter 8:
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CHAPTER 1 GETTING READYWould you l
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CHAPTER 1 GETTING READYThe server-
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CHAPTER 1 GETTING READYListing 1-3
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CHAPTER 1 GETTING READY{{each prop
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C H A P T E R 2Getting StartedIn th
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CHAPTER 2 GETTING STARTEDListing 2
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CHAPTER 2 GETTING STARTED• Cauti
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CHAPTER 2 GETTING STARTEDIn Listin
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CHAPTER 2 GETTING STARTEDHandling
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CHAPTER 2 GETTING STARTEDFigure 2-
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CHAPTER 2 GETTING STARTED($0)Total
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CHAPTER 2 GETTING STARTED})}$('.la
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CHAPTER 2 GETTING STARTEDOnce agai
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CHAPTER 2 GETTING STARTED...$('spa
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CHAPTER 2 GETTING STARTEDFigure 2-
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CHAPTER 2 GETTING STARTED...This c
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CHAPTER 2 GETTING STARTED• Tip O
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CHAPTER 2 GETTING STARTEDSummaryAs
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CHAPTER 3 ADDING A VIEW MODELCreat
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CHAPTER 3 ADDING A VIEW MODEL$('#b
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CHAPTER 3 ADDING A VIEW MODELThe o
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CHAPTER 3 ADDING A VIEW MODEL};{id
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CHAPTER 3 ADDING A VIEW MODELfunct
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CHAPTER 3 ADDING A VIEW MODELFigur
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CHAPTER 3 ADDING A VIEW MODELitem.
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CHAPTER 3 ADDING A VIEW MODEL $()T
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CHAPTER 3 ADDING A VIEW MODELimmed
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CHAPTER 3 ADDING A VIEW MODELYou c
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CHAPTER 3 ADDING A VIEW MODELmapPr
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CHAPTER 3 ADDING A VIEW MODELAs I
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CHAPTER 3 ADDING A VIEW MODELFigur
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CHAPTER 3 ADDING A VIEW MODEL});if
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C H A P T E R 4Using URL RoutingIn
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CHAPTER 4 USING URL ROUTINGwe requ
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CHAPTER 4 USING URL ROUTINGAdding
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CHAPTER 4 USING URL ROUTINGApplyin
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CHAPTER 4 USING URL ROUTINGConsoli
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CHAPTER 4 USING URL ROUTINGListing
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CHAPTER 4 USING URL ROUTINGThe app
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CHAPTER 4 USING URL ROUTINGurl att
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CHAPTER 4 USING URL ROUTINGThe sel
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CHAPTER 4 USING URL ROUTING• Not
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CHAPTER 4 USING URL ROUTINGcrossro
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CHAPTER 4 USING URL ROUTINGRestori
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CHAPTER 4 USING URL ROUTINGAdding
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Page 109 and 110: C H A P T E R 5Creating Offline Web
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Page 169 and 170: C H A P T E R 7Creating Responsive
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Page 195 and 196: C H A P T E R 8Creating Mobile Web
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CHAPTER 8 CREATING MOBILE WEB APPS
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C H A P T E R 9Writing Better JavaS
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CHAPTER 9 WRITING BETTER JAVASCRIP
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• INDEXHTML5 local storage featur
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• INDEXURL routing, CheeseLux (co
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Pro JavaScript for Web AppsCopyrigh
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Contents• About the Author.......
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• CONTENTS• Chapter 3: Adding a
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• CONTENTSUsing Persistence in th
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• CONTENTSAdding Tests for a Modu
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About the Technical Reviewer RJ Owe
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