All You Need to Know about AngularJS 2
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All You Need to Know about AngularJS 2

Author: Lavya Nigam | Categories: Websites, Website Design & User Experience, Online Marketing

Over the past few years, AngularJS has emerged as one of the leading open source JavaScript application frameworks. Powered by tech giant Google, AngularJS 2 has been designed with the idea of providing a mobile-first approach.

The first version of AngularJS, Angular 1, was extremely popular among developers – especially the ones creating complex web applications. This framework simplifies the development task and helps speed up the process. With the release of the latest version, Angular 2, writing and testing an application is all set to become even simpler.

AngularJS 2 is set with everything you need to build a complex web application, such as:

  • Powerful templates

  • Fast rendering

  • HTTP services

  • Form handling, and many others

In today’s API-driven age, Angular 2 has become crucial for creating single page applications (SPA). Previously, when there was a visitor, the website’s server would load the entire collection of assets, such as JS, CSS, images, etc., on the page. In the event that the user clicked on a link, the website would redirect to a new location, and the entire process of re-loading all assets and objects on the destination webpage would repeat. Today, SPAs have replaced this cycle by making the traditional behavior obsolete. For the starters, SPAs are standard web applications that load an entire webpage for once, along with all its assets and resources, and perform redirection by updating the webpage contents dynamically.

Below is an illustration highlighting the page refresh process in single page applications:

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Image source: Code School

Features of Angular 2

To understand the benefits of using AngularJS 2, it is important that the features of this framework be first understood. Some of the key features of Angular 2 include:

  • Angular 2 mainly focuses on mobile development. It proficiently handles mobile-related challenges, such as load time, performance, etc.

  • Angular 2 is a module-based web development framework. It offers you a choice to pick the modules you require, to develop a web application. This in turn makes the development task easy to manage, and optimize the performance too.

  • Angular 2 supports typescript language for building web applications.

  • One of the highlights of Angular 2 is that it also keeps track of history. If, for instance, a user navigates to other pages on a website, Angular 2 can restore the application in the right state – with the right content view.

  • It offers a cross-platform framework environment and supports all latest browser versions.

Why to use the Angular 2 framework?

The advantages of exploring the benefits of Angular 2 are plenty. Here’re some to get you started:

Two-Way data binding: Angular 2 provides an automatic synchronization of data between view (HTML) and model (JavaScript variables).

Routing Support: While asynchronously loading content on the page, Angular 2 modifies the URL of the browser to reflect the changes in view.

Custom HTML syntax: Using AngularJS 2 one can create new elements/attributes, and extend new syntax to HTML. For example, we can create a tag with its functionality, and use it in HTML code for rendering a map on the webpage with defined functionality.

If you have been using jQuery, and are now struggling to confirm your decision about using Angular 2 in your upcoming project, here’s a comparison chart between the two to help you decide.

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As you can see from the above, AngularJS 2, with its wide-ranging features, empowers you to create single page applications in the most creative way.

Building-blocks of Angular 2

To be able to use Angular 2 as a ‘pro’, you need to be acquainted with its architectural style. Below is an outline of the same:

  1. Modules: A module is a group of codes, which is integrated with other code groups to run Angular 2-based applications. It exports classes, functions, and values from its code.

  2. Components: A component is a controller class with a template that mainly deals with the view of the application.

  3. Templates: A template is a HTML form, which defines the view of a component. It defines the method that the compiler can use to render a component on a webpage.

  4. Metadata: Metadata helps in processing a class. In Angular, data is attached to a class to highlight its type – this data is known as the metadata. For instance, attaching data to the class can help provide clarity on whether it’s a component-type class or a service-type class.

  5. Data binding: It’s a way of sending and receiving data between a template and a component.

  6. Services: Services are functions or methods that perform specific tasks only. It’s a class without any template, which is often used for CRUD (create, read, update, delete) operations in the database.

  7. Directives: Directives are used for modifying DOM (Document Object Model) elements, and can extend or change their default functionalities.

Is Angular 2 just a framework?

Angular 2 is definitely much more than that!

While the MVC-architectural pattern (model-view-controller) was prevalent in the past, Google has revolutionized it in a way by reprocessing Angular2 as a component-based framework. Components provide a way for writing application in parts – having different functionalities – which increase the modularity of applications and help reusing them.

Prerequisite knowledge

  1. You don’t need prior experience to be able to work using Angular 1. Angular 2, on the other hand, requires a way-different approach to develop web applications as compared to Angular 1. It is modern, more compatible with different platforms, and versatile – thereby making it easier for new programmers to learn and work on it.

  2. It helps if one has basic knowledge of:

    • HTML & CSS

    • JavaScript

    • Typescript

Advantages of Angular 2 over Angular 1

  • Speed — Angular 2 is faster.

  • Components — Instead of controllers and scope, we use components, which are simple and easy to understand.

  • Simpler Directives — Creating custom directives are much simpler here.

  • Data binding — Links data to HTML.

  • It uses server side rendering for fast views on mobile.

In the end…

As is clear from the above, AngularJS 2 offers a better environment for quickly developing apps and migrating an existing application. With a plethora of new syntax and several advanced features set in, AngularJS 2 is definitely what you ought to check out now!