Download Programming Chrome Apps by Marc Rochkind PDF
By Marc Rochkind
Placed your internet app layout talents to paintings by way of studying tips on how to create strong and transportable Chrome Apps. With this sensible ebook, you’ll the right way to construct Google’s special apps to act similar to local apps to allow them to have interaction with units, entry exterior records, and ship notifications.
Author Marc Rochkind takes you thru a hands-on, goal travel 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. for those who understand how to paintings with HTML, CSS, JavaScript, and the DOM, you’re able to get started.
Learn the right way to construct, run, and debug Chrome Apps step-by-stepUse Chrome Apps to entry neighborhood documents, sync records, and exterior filesTake benefit of key-value-pair APIs, together with sync garage and IndexedDBUse WebSockets, Google Cloud Messaging, and different networking methodsDisplay snap shots and pictures 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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Here, you can see error mes‐ sages generated by Chrome and your own debugging output that you write with the console API. For more documentation on this, go to the Console API Reference. 28084; Debugging Chrome Apps | 15 Figure 1-11. A breakpoint set in debugger Figure 1-12. App paused at the breakpoint 16 | Chapter 1: Your First Chrome App Figure 1-13. 28084; Figure 1-14. Value displayed as JavaScript object There are additional console API calls for assertions, error logging, and getting a stack trace, which you can read about in the Console API Reference.
The options argument can have two optional Boolean keys. The first, create, means that the directory is created if necessary; if create is missing or false, the call fails if the directory isn’t there. 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.
Debugging Chrome Apps | 17 Chrome Release Channels As you might already know, there are four release channels for Chrome. These provide differing degrees of testing and update frequency. As releases mature, they make their way through the channels, which are described here: Stable Most tested, and intended to be used by most nondevelopers. These releases are updated about every six weeks, with minor updates more often. Beta A release due to become stable as soon as it’s fully tested, subjected to field testing as a beta, and had some remaining bugs fixed.