What is Angular2 js?
Angular, or AngularJS as it’s officially known, is a front-end structural framework for dynamic web app development. It utilizes HTML as a template language which it then extends to define an application’s components. The Angular framework provides data binding and dependency injection that minimizes the amount of code you have to write yourself. Since Angular works within the browser, it may be employed with your server technology of choice.
Progressive web apps
Use modern web platform capabilities to deliver app-like experiences. High performance, offline, and zero-step installation.
Build native mobile apps with strategies from Ionic Framework, NativeScript, and React Native
Create desktop-installed apps across Mac, Windows, and Linux using the same Angular methods you’ve learned for the web plus the ability to access native OS APIs.
Speed and Performance
Serve the first view of your application on node.js, .NET, PHP, and other servers for near-instant rendering in just HTML and CSS. Also paves the way for sites that optimize for SEO.
Angular apps load quickly with the new Component Router, which delivers automatic code-splitting so users only load code required to render the view they request.
Quickly create UI views with simple and powerful template syntax.
Command line tools: start building fast, add components and tests, then instantly deploy.
Get intelligent code completion, instant errors, and other feedback in popular editors and IDEs.
Following are most important core features of AngularJS ?
- Data-binding ? It is the automatic synchronization of data between model and view components.
- Scope ? These are objects that refer to the model. They act as a glue between controller and view.
- Services ? AngularJS come with several built-in services for example $https: to make a XMLHttpRequests. These are singleton objects which are instantiated only once in app.
- Filters ? These select a subset of items from an array and returns a new array.
- Directives ? Directives are markers on DOM elements (such as elements, attributes, css, and more). These can be used to create custom HTML tags that serve as new, custom widgets. AngularJS has built-in directives (ngBind, ngModel…)
- Templates ? These are the rendered view with information from the controller and model. These can be a single file (like index.html) or multiple views in one page using “partials”.
- Routing ? It is concept of switching views.
- Model View Whatever ? MVC is a design pattern for dividing an application into different parts (called Model, View and Controller), each with distinct responsibilities. AngularJS does not implement MVC in the traditional sense, but rather something closer to MVVM (Model-View-ViewModel). The Angular JS team refers it humorously as Model View Whatever.
- Deep Linking ? Deep linking allows you to encode the state of application in the URL so that it can be bookmarked. The application can then be restored from the URL to the same state.
- Dependency Injection ? AngularJS has a built-in dependency injection subsystem that helps the developer by making the application easier to develop, understand, and test.
Advantages of AngularJS
- AngularJS provides capability to create Single Page Application in a very clean and maintainable way.
- AngularJS provides data binding capability to HTML thus giving user a rich and responsive experience
- AngularJS code is unit testable.
- AngularJS uses dependency injection and make use of separation of concerns.
- AngularJS provides reusable components.
- With AngularJS, developer write less code and get more functionality.