Real World Windows 8 App Development with JavaScript: Create by Edward Moemeka, Elizabeth Moemeka

By Edward Moemeka, Elizabeth Moemeka

Actual international home windows eight App improvement with JavaScript will give you functional recommendation and genuinely-earned insights that can assist you create and post apps to a world market.
Led through authors with deep home windows eight app improvement event, you’ll how to utilize Microsoft’s APIs for hooking into home windows eight on all units, together with the middle rules of gives you and the asynchronous programming version. You’ll additionally notice such very important assistance as how to:

* Adhere to home windows eight directions for profitable app acceptance
* expand the charm of your app with media, contracts, charms, and consumer notifications
* catch and paintings with media, together with the facility to play video wirelessly to a television
* deal with heritage processing and dossier transfers
* achieve visibility in your app and upload monetization options

Get the lowdown from authors with event from front traces of home windows eight app improvement. thought is all good and reliable, but if it comes all the way down to it, you can’t beat functional suggestion from humans who’ve been there and performed it! You’ll come clear of this e-book with all of the instruments, principles, and notion you want to create winning home windows eight JavaScript apps.

Development with JavaScript good points real-world examples that emphasize using JavaScript and HTML five and that still adhere to the stylistic directions Microsoft has installed position to take care of a constant appear and feel for all purposes in this platform.

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Additional info for Real World Windows 8 App Development with JavaScript: Create Great Windows Store Apps

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As stated, many of the Windows Library for JavaScript (WinJS) functions use an asynchronous programming model that requires the use of promises. The rest of the example is straightforward. Listing 2-2 is a snippet of Listing 2-1 focusing in on the process of reading a file. Listing 2-2. localFolder. value = text; }); } }); }; From Listing 2-2 you can see that file access is a two-step process. You first need to get the file, and then, once you have an object that represents the file you want to access (a StorageFile object), you can use that handle in subsequent calls (in this case, you use it as an argument in the readTextAsync function).

43 Chapter 2 ■ Getting the Basics Right External Known Folders If you request the Documents Library, Pictures Library, Music Library, or Videos Library, you can also access files on any connected media server as a storage location by using the mediaServerDevices property of KnownFolders. Note that the files you see on the device are scoped based on the capabilities you specify, meaning that if you only declare Music Library capabilities, you see only music files on the media server to which you connect.

Figure 2-2. Capabilities tab 42 Chapter 2 ■ Getting the Basics Right Selecting any one of the library capabilities (Documents Library, Music Library, Pictures Library, or Videos Library) enables access to the associated storage location through the appropriate ApplicationData property. The section “External Known Folders” discusses how to enable capabilities for the other three KnownFolders properties (homeGroup, mediaServerDevices, and removableDevices). Next, you must explicitly declare which file types your application reads from and writes to.

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