Get Programming Chrome Apps PDF

By Marc Rochkind

ISBN-10: 1491904283

ISBN-13: 9781491904282

Positioned your internet app layout talents to paintings by way of studying the best way to create robust and transportable Chrome Apps. With this sensible publication, you’ll easy methods to construct Google’s targeted apps to act similar to local apps to allow them to engage with units, entry exterior records, and ship notifications.

Author Marc Rochkind takes you thru a hands-on, target journey of Chrome Apps, which run on any platform that helps the Chrome browser—including OS X, home windows, Linux, in addition to Android and iOS. in case you know the way to paintings with HTML, CSS, JavaScript, and the DOM, you’re able to get started.
Learn how you can construct, run, and debug Chrome Apps step-by-stepUse Chrome Apps to entry neighborhood records, sync documents, and exterior filesTake benefit of key-value-pair APIs, together with sync garage and IndexedDBUse WebSockets, Google Cloud Messaging, and different networking methodsDisplay photographs and photographs with Canvas, SVG, and the Media Galleries APIUse alarms, context menus, place, the digicam, Bluetooth, USB, and different APIsPublish apps to the Chrome net shop with the Chrome Dev Editor

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You’ll then be presented with a form where you enter a detailed description; the app’s icon (the same file that’s referenced by the manifest, in most cases); some screenshots; some promotional tile images; your website URL; the regions where you want the app distributed; the pricing (if it isn’t free); the language; whether it’s “mature content”; and whether it’s for all users, only people with the link, or just trusted testers, possibly including members of a Google Group that you own or manage.

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FileSystem and DirectoryEntry An app can’t just begin manipulating files without a formal introduction. It must first request a filesystem and a space allocation with a call to requestFileSystem: requestFileSystem(type, size, successCallback, errorCallback) type is either PERSISTENT, which means that the data you write stays until you delete it, or TEMPORARY, which means that the browser can delete the data if it wants to, like a 24 | Chapter 2: Local Files, Sync Files, and External Files cache.

If the second option, exclusive, is true, creation fails if the directory already exists. If neither option is true, the call succeeds only if the directory exists. Most commonly, you specify create: true when you want to create the directory if needed, which is what we did here, and no options if the directory must already exist. ) There’s no concept of getting a DirectoryEntry for reading or writing; it can always do both. You can also remove a directory and all its contents, across multiple levels: removeRecursively(successCallback, errorCallback) You can read the contents of a directory by using the createReader method, but I won’t go into the details.

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Programming Chrome Apps by Marc Rochkind


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