Angular2

Angular 2 is an open source JavaScript framework to build web applications in HTML and JavaScript and has been conceived as a mobile first approach. It is the next big deal. Being the successor of the overwhelmingly successful Angular.js framework it’s bound to shape the future of frontend development in a similar way. The powerful features and capabilities of Angular 2 allow you to create complex, customizable, modern, responsive and user friendly web applications.

Motivations for Angular 2.0

1. Angular 2 is faster than Angular 1 and offers a much more flexible and modular development approach.
2. It uses TypeScript which is a primary language for developing of Angular applications, The TypeScript is a super set of JavaScript which is migrated to TypeScript and code written in TypeScript makes less prone to run time errors.
3. It supports latest the version of browsers and also supports old browsers including IE9+ and Android 4.1+.
4. It is a cross platform framework, It uses server side rendering for fast views.
5. It uses dependency injection to maintain applications without writing too long code, Everything will be the component based approach.

Angular 2 Is Easier

Angular 2 codebase is more modern, more capable and easier to learn than Angular 1.x. With Angular 1, we had to understand the differences between Controllers, Services, Factories, Providers and other concepts that could be confusing. Angular 2 is a more streamlined framework that allows to focus on simply building JavaScript classes. Views and controllers are replaced with components, which can be described as a refined version of directives. It's components are considerably easier to read, and their API features less jargon than Angular 1.x's directives.

Performance

Angular 2, like React and other modern frameworks, can leverage performance gains by rendering HTML on the server or even in a web worker. Depending on application/site design this isomorphic rendering can make a user's experience feel even more instantaneous.

The quest for performance does not end with pre-rendering. Angular 2 makes itself portable to native mobile by integrating with NativeScript, an open source library that bridges JavaScript and mobile.

What Makes Angular 2 Unique?

Many things make Angular 2 more unique and different in its context. Now, we have a safer and more simplified code approach in Angular 2.

Angular 2 is not only a compelling alternative but all of the front-end libraries and frameworks. Reason being:

Typescript

One of the distinct updates in Angular 2 is TypeScript. TypeScript ensures safer code. Most programmers don't understand the core objective of TypeScript; they confuse it with lesser code. But, TypeScript ensures you to make more reliable code.

TypeScript is developed by Microsoft and is the type superset of JavaScript that compiles your code into plain JavaScript. TypeScript can easily track the bugs in your code. Now, you don’t need to worry about the program correctness.

The code correctness has been done previously by other ways too but by using TDD or Code Reviews. Most of the bugs have to do with typing issues (syntax), so TypeScript offers you a complete set of features for advanced IntelliSense experience for programmers.

Dependency Injection

Dependency Injection works when you need to import any dependency in your application. It is the way to give a new object of a class with the required dependency. Mostly, dependencies are services. To provide the new component with services, Angular uses DI (Dependency Injection).

It automatically tells about the services by looking into constructor parameters. And when it creates the component then it will ask an Injector for the service. If requested service is not in the container, Angular inject will auto-create and inject into your component.

Jasmine

Jasmine in Angular 2 provides an API that poorly attempts to read sentences. Moreover, it provides bunch of assertion bells and whistle. So, Angular 2 gives you less-boilerplate.