Download e-book for iPad: AngularJS by Brad Green, Shyam Seshadri

By Brad Green, Shyam Seshadri

ISBN-10: 1449344852

ISBN-13: 9781449344856

Develop smaller, lighter net apps which are basic to create and straightforward to check, expand, and hold as they develop. This hands-on advisor introduces you to AngularJS, the open resource JavaScript framework that makes use of Model–view–controller (MVC) structure, info binding, client-side templates, and dependency injection to create a much-needed constitution for development net apps.

Guided via engineers who labored on AngularJS at Google, you’ll stroll in the course of the framework’s key beneficial properties, after which construct a operating AngularJS app—from format to trying out, compiling, and debugging. You’ll find out how AngularJS is helping lessen the complexity of your internet app.
* Dive deep into Angular’s construction blocks and find out how they interact
* achieve greatest flexibility via isolating good judgment, info, and presentation tasks with MVC
* gather your complete app within the browser, utilizing client-side templates
* Use AngularJS directives to increase HTML with declarative syntax
* converse with the server and enforce easy caching with the $http carrier
* Use dependency injection to enhance refactoring, testability, and a number of atmosphere layout
* Get code samples for universal difficulties you face in so much net apps

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You can think of scopes as a context that you use to make changes to your model observable. count = 5. There are also some indirect ways to set up the model from the template itself. You can do so in the following ways: 1. Through an expression. Since expressions execute in the context of the controller’s scope associated with their element, setting properties in expressions is the same as setting a property of the controller’s scope. count=3; } } 2. Using ng-model on a form input. As with expressions, the model specified as the argument for ng-model also works within the scope of the enclosing controller.

Instead of throwing a NullPointerException error, templates will simply render nothing. This allows you to safely use model values that haven’t been set yet, and have them appear in the UI as soon as they get populated. Separating UI Responsibilities with Controllers Controllers have three responsibilities in your app: • Set up the initial state in your application’s model • Expose model and functions to the view (UI template) through $scope • Watch other parts of the model for changes and take action We’ve seen many examples of the first two in this chapter already.

With the focus highlight. Hitting the spacebar or the enter key will cause a click and invoke the ng-click, which will set the div text to ‘focus button clicked’. Opening this example in a browser, we’d see something that looks like Figure 2-4. Figure 2-4. Focus directive 44 | Chapter 2: Anatomy of an AngularJS Application Validating User Input Angular automatically augments

elements with several nice features suitable for single-page applications. One of these nice features is that Angular lets you declare valid states for inputs within the form and allow submission only when the entire set of elements is valid.

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AngularJS by Brad Green, Shyam Seshadri


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