August 5, 2020

Angularjs vs Angular 2 vs Angular 4

It is really tough to decide which framework to choose for developing dynamic web and mobile applications. Before moving into the comparison among AngularJS, Angular 2, and Angular 4, let’s first know ‘What is Angularjs?,’ ‘What are its various versions?’ and their features and drawbacks. Keep on reading!

To get a clear understanding, check out our video on Angular:

What is AngularJS?

AngularJS is also referred to as Angular 1, which is an open-source JavaScript framework. This framework is designed to build single-page applications. It overcomes the downside of HTML and also makes the best practice of libraries. Following are some of the features of AngularJS:

  • Model-View-Controller:
    AngularJS supports the MVC architecture that makes it easy for
    developers to design client-side web applications.
  • Data
    model binding:
    There
    is no need for writing code to bind data to HTML. This will be done
    by adding a few code snippets by Angular.
  • Requires
    less code:
    Before
    Angular, there was a need for a lot of JavaScript code for Document
    Object Model (DOM) manipulation for developing an application.
    Angular requires lesser code for DOM manipulation.
  • Unit
    testing:
    Earlier, it was time
    taking to perform testing for each component
    of an application. In AngularJS, the testing process is very simple.
    It uses dependency injection to connect with the application that
    manages and controls everything with simplicity.

Following are some of the pros and cons of AngularJS.

Pros:

  • AngularJS
    supports both unit testing and integration testing.
  • It
    provides a routing facility, which is making a move from one view to
    another.
  • It
    provides two-way binding, which keeps the presentation layer and
    data in sync.
  • It
    provides directives that help the functionality of HTML elements,
    which provide more power
    to a web application.

Cons:

  • AngularJS
    is less secure because it doesn’t provide server authentication
    and authorization.
  • It
    might lead to a memory leak, which causes various issues such as
    high latency, crashing, and slowing down of the process.
  • It
    has various ways to perform the same task,
    so it is hard to predict which is the best way to perform the task.
  • It
    is not supported everywhere, and it is totally
    based on JavaScript.

What is Angular 2?

Angular
2 (Angular)
is a complete remake of the original AngularJS. It was rebuilt from
scratch using TypeScript by the Angular team, keeping in mind the
concept of having components with better performance and improved
features that would help Web Developers.
Some of the key features of Angular 2 are as given below:

  • TypeScript:
    TypeScript is the superset of
    JavaScript that allows an increase in code efficiency by using the
    OOPs concept.
  • Components:
    Angular
    2 focusses on components over controllers, which helps in
    efficiently maintaining applications within a period of time.
  • Services:
    It
    provides a set of code (services) that could be shared by various
    components of the applications.
  • Cross-platform:
    With
    Angular, we can build and run applications on desktops, iOS, and
    Android systems.

Here
are some of the advantages and disadvantages of Angular 2.

Advantages:

  • Angular
    2 provides simpler routing,
    and it is mobile-oriented.
  • It
    provides various languages to choose from, such as TypeScript, Dart,
    ES6, and ES5.
  • It
    has enhanced modularity and dependency injection.

Disadvantages:

  • Angular
    2 is tough to set up when compared to AngularJS.
  • It
    is not effective in building small and simple web applications.

What is Angular 4?

Angular
4 is the rewritten version of AngularJS, which is quite different
from Angular 2. It has a few minor changes, along with some newly
added features to it. Angular 4 also supports TypeScript, compatible
with JavaScript, which gives the same output.

Following
are some of the key features of Angular 4:

  • Faster
    and smaller:
    In this version,
    programs run quicker than in the older versions and use less space.
  • Animation
    package:
    This feature helps
    us find docs easily and acquire the advantage of auto-completion by
    importing the @angular/platform-browser/animations package.
  • Angular
    Universal:
    The greater part
    of the universal code is located in the new renderModuleFactory
    method in the @angular/platform server that consists of many code
    samples and documentation.
  • Compatibility
    of TypeScript 2.1 and 2.2:
    The
    Angular team has enhanced the TypeScript version, which offers
    better type checking throughout the program.

Following
are some of the pros and cons of Angular 4.

Pros:

  • It
    allows faster application development processes and also
    easy-to-write tests.
  • It
    provides a modular animation package.
  • It
    is used for single-page web applications with an improved view
    engine.
  • It
    supports TypeScript and also helps in developing large applications.

Cons:

  • The
    processing is slow when displaying a huge amount of data.
  • Testing
    is challenging in Angular 4.
  • It
    doesn’t support the older versions of browsers.
  • It
    is difficult to maintain server templating.

As we have come to know about ‘What is Angular?’ and their versions, now, let’s dive into the discussion on ‘Angular vs AngularJS,’ ‘Angular 2 vs Angular 4,’ and ‘AngularJS vs Angular4.’

Differences Between Angular 2 and AngularJS

Here is the comparison between Angular and AngularJS based on mobile support, functions, and architecture.

Angular 2

AngularJS

Released in 2016

Released in 2010

Follows
a component-service
architecture
Service/Control
architecture

Follows Model-View-Controller (MVC)
architecture

Was
created to build mobile-based applications

Was created to build web-based
applications

Runs
on both server-side and client-side

Runs only on client-side

To initialize bootstrap, the module()
function is used

To initialize
AngularJS bootstrap, ng-app functions are used

Difference Between Angular 2 and Angular 4

Below
are some of the differences between Angular and Angular 4 versions:

Angular 2

Angular 4

The size of a file generated by
Angular 2 is large, hence the performance is slow

The size of a file generated by
Angular 4 is reduced by 60% so that the performance is fast

The animation package is not present

The animation package is present

Angular 2 is compatible with
TypeScript and Dart

Angular 4 is compatible with the
enhanced versions of TypeScript 2.1 and TypeScript 2.2

It doesn’t have a specific phase to
adjust code

It has a proper phase to adjust code
for developers

Instance
scope controller is present

Instance
scope controller is not present

AngularJS vs Angular 2 vs Angular 4: A Complete Comparison

Parameters

AngularJS

Angular 2

Angular 4

Origin

It is an open-source front-end
framework used for developing dynamic web apps

Angular 2 is an open-source front-end
web application framework

Angular 4, an enhanced version of
AngularJS,
is an open-source web
application platform

Architecture

AngularJS follows the
Model-View-Controller architecture

Angular
2 is based-on the component-service architecture

Angular 4 is based on
structural-directives

Language used

AngularJS uses JavaScript

Angular 2 uses Microsoft’s
TypeScript

Angular 4 uses the latest versions of
TypeScript

Expression syntax

In AngularJS, we need to remember the
accurate ng directive to add images, property, and events

Angular 2 follows parentheses () for
event binding and square brackets [] for property binding

Angular 4 follows advanced syntax,
i.e., ngIf and ngFor directives

Performance

Slow performance

Faster performance

Improved performance by dependency
injection

Routing

The $routeProvider.when() method is
used for routing configuration

@RouterConfig{(….)} is used by
Angular 2 for routing configuration

It uses two routing methods:
RouterModuleforRoot () and RouterModuleforChild ()

Conclusion

As
Angular is evolving constantly, developing web applications have
become more secure, flexible, and scalable, which helps developers
work easily. The enhanced versions have better components, execute
faster than the older versions, and allow us to upgrade ourselves
easily to the latest versions of Angular. As of now, the latest
version of Angular is Angular 8 that is used by expert Web
Developers. Although for beginners, Angular 2 is easier to understand
than Angular 4.

If
you are interested in Web Development, enroll now in Intellipaat’s
Angular
Certification Training Course
!

I
hope this article was helpful
for you to understand the complete differences between the different
versions of Angular. If you have any more queries, share them in the
comments section below.

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