Why AngularJS?
HTML is great for declaring static documents, but it falters when we try to use it for declaring dynamic views in web-applications. AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop.
Alternatives
Other frameworks deal with HTML’s shortcomings by either abstracting away HTML, CSS, and/or JavaScript or by providing an imperative way for manipulating the DOM. Neither of these address the root problem that HTML was not designed for dynamic views.
Extensibility
AngularJS is a toolset for building the framework most suited to your application development. It is fully extensible and works well with other libraries. Every feature can be modified or replaced to suit your unique development workflow and feature needs. Read on to find out how.
The Basics
Add Some Control
Data Binding
Data-binding is an automatic way of updating the view whenever the model changes, as well as updating the model whenever the view changes. This is awesome because it eliminates DOM manipulation from the list of things you have to worry about.
Controller
Controllers are the behavior behind the DOM elements. AngularJS lets you express the behavior in a clean readable form without usual boilerplate of updating the DOM, registering callbacks or watching model changes.
Plain JavaScript
Unlike other frameworks, there is no need to inherit from proprietary types; to wrap the model in accessors methods. Just plain old JavaScript here. This makes your code easy to test, maintain, reuse, and again free from boilerplate.
Watch as we build this app
Wire up a Backend
Deep Linking
A deep link reflects where the user is in the app, this is useful so users can bookmark and email links to locations within apps. Round trip apps get this automatically, but AJAX apps by their nature do not. AngularJS combines the benefits of deep link with desktop app-like behavior.
Form Validation
Client-side form validation is an important part of great user experience. AngularJS lets you declare the validation rules of the form without having to write JavaScript code. Write less code, go have beer sooner.
Server Communication
AngularJS provides services on top of XHR, that dramatically simplify your code. We wrap XHR to give you exception management and promises. Promises further simplify your code by handling asynchronous return of data. This lets you assign properties synchronously when the return is actually asynchronous.
Create Components
Directives
Directives is a unique and powerful feature available only in Angular. Directives let you invent new HTML syntax, specific to your application.
Reusable Components
We use directives to create reusable components. A component allows you to hide complex DOM structure, CSS, and behavior. This lets you focus either on what the application does or how the application looks separately.
Localization
An important part of serious apps is localization. Angular's local aware filters and stemming directives give you building blocks to make your application available in all locales.
Locale: US
Locale: SK
Embed and Inject
Embeddable
AngularJS works great with other technologies. Add as much or as little of AngularJSJS to
an existing page as you like. Many other frameworks require full commitment. This page
has multiple AngularJS applications embedded in it. Because AngularJS has no global
state multiple apps can run on a single page without the use of iframes. We
encourage you to view-source and look around.
Injectable
The dependency injection in AngularJS allows you to declaratively describe how your
application is wired. This means that your your application needs no main()
method which is usually an unmaintainable mess. Dependency injection is also a core to
AngularJS. This means that any component which does not fit your needs can easily be
replaced.
Testable
AngularJS was designed from ground up to be testable. It encourages behavior-view separation, comes pre-bundled with mocks, and takes full advantage of dependency injection. It also comes with end-to-end scenario runner which eliminates test flakiness by understanding the inner workings of AngularJS.