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CHAPTER 7 CREATING RESPONSIVE WEB APPS $()($)Total:$The joy of this approach is how few changes are required to make a web app responsive to screensize (and how simple those changes are). That said, there are a small number of changes that requireexplanation, which I provide in the following sections. You can see how my responsive web app appearson large and small screens in Figure 7-4.Figure 7-4. The same web app displayed on a large and small screen182www.it-ebooks.info
CHAPTER 7 CREATING RESPONSIVE WEB APPSThese small changes have a big impact, and for the most part, the changes are cosmetic. Theunderlying features and structure of my web app remain the same. I don’t have to forgo my view modelor routing just to support a device with a smaller screen.Adapting the Source DataThe category buttons are a problem on a small screen, so I want to display something to the user that ismeaningful but requires less screen space. To do this, I made some additions to the products.json file sothat each category contains a name to be used when space is limited. Listing 7-10 shows the addition forone of the categories.Listing 7-10. Adding Screen-Specific Information to the Product Data...[{"category": "British Cheese","shortName": "British","items" : [{"id": "stilton", "name": "Stilton", "price": 9,"description": "A semi-soft blue cow's milk cheese produced in theNottinghamshire region. A strong cheese with a distinctive smelland taste and crumbly texture."},...I have applied a similar change to all of the other categories in the products.json file. I could havearrived at the short name by splitting the category value string on the space character, but I want tomake the point that it is not just the script and markup in a web app that can be responsive; you can alsosupport this concept in the data that drives your application.In Listing 7-9, I modified the data binding for the navigation buttons to take advantage of theshorter categories names, like this:I still use the full category name for the formatAttr binding. This allows me to use the same set ofnavigation routes irrespective of the screen size (see Chapter 4 for details of using routing in a web app).Applying Conditional jQuery UI StylingIn the large screen layout, I resize the product list elements to make room for the basket. In the smallscreen layout, I replace the dedicated basket with a one-line total at the end of each section. I like to takeadvantage of the matchMedia.addListener feature if it is available, which means I must be able to togglebetween the small and large screen layouts as needed. To accommodate this, I treat those script183www.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 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 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 ROUTINGRestori
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CHAPTER 4 USING URL ROUTINGAdding
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CHAPTER 4 USING URL ROUTING}"#sele
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CHAPTER 4 USING URL ROUTINGFigure
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CHAPTER 4 USING URL ROUTING• Tip
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C H A P T E R 5Creating Offline Web
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CHAPTER 5 CREATING OFFLINE WEB APP
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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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Page 229 and 230: C H A P T E R 9Writing Better JavaS
Page 231 and 232: CHAPTER 9 WRITING BETTER JAVASCRIP
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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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