How AngularJS Is Different from Angular 2

Angular 2, for all intents and purposes, is a lot more than a simple upgrade from Angula JS. In fact, it’s a full-feature revived framework. In fact, AngularJS (for all intents and purposes) is on the fast-track to obsoleting.

Plus, Angular 2 makes programming easier – and is infinitely more scalable than AngularJS. Transitioning to the next upgrade will require a lot less steps for Angular2 programmers.

There are several versions of the ECMAScript standard (which Javascript is an implementation of), such as ES6 and ES5. The most recent version of JS (ES6) makes certain tasks easier. However, it must be noted that ES6 is typically converted to ES5 before browsers can read it.

Let’s take a look at several, more important ways that separate Angular JS from its superior younger brother, Angular 2.

Easier to Read

For developers who have a desire to program Angular 2 apps, Dart is a suitable language. It’s similar (in features) to TypeScript, except for the following ways:

  • Dart has…
  • Tree shaking
  • Setters and getters
  • A native VM
  • An import system
  • Mirrors
  • And more.

Angular 2 is handy for developers and programmers who are already well-invested and well-versed in Dart, who are looking to develop and improve more.

Additionally, in Angular 2, Typescript is a lot easier to read than its predecessor. Here is a component coded in Typescript:

import { Component } from ‘@angular/core’;
@Component({

selector: ‘hello-app’,

template: ‘<h1>Hello Angular 2</h1>’

})

export class AppComponent { }

Here is the same exact component, as coded in ES5.

(function(app) {

app.AppComponent = ng.core.Component({

selector: ‘hello-app’,

template: ‘<h1>Hello Angular 2</h1>’

})

.Class({

constructor: function() {}

});

})(window.app || (window.app = {}));

It’s easy to immediately see that Typescript is simplified, concise, and takes less time to code than its ES5 predecessor. It only takes a fraction of a second to see that Typescript is simplified, more concise, and takes less time to code than its ES5 counterpart.

Dart, along with TypeScript, is a superset of JS. However, they don’t work on current versions of browsers. Certain utilities convert code back to JS Es5. Using this method, developers are given advanced features they can use while still allowing their code to be fully run on all platforms and browsers.

Hierarchical Dependency Injection System

This performance booster marks a huge difference in the separation. In Angular 2 a new injector is created for every component. To resolve dependencies, injectors for components are checked to see whether or not they can be provided. In circumstances a provider is not available, injectors search the component tree to find the component injector’s parent to see if a dependency can be provided.

Supports Mobile

During development, Angular 1.x was created for two-way binding apps. Unfortunately, there wasn’t mobile support. As over a billion people use mobile, clearly the lack of mobile support was a tremendous downside/con. However, Angular 2 has its focus on the mobile culture, which renders the same code (in different ways) on browsers and mobile apps alike.

To put it plain and simple: Angular 2 lets you build mobile apps. This is a great victory for not only developers, but for marketers as well. As the number of people who use mobile rises, so does the potential cash flow and income with each app release.

If finances aren’t on your mind – the HUGE number of app users means that your product/service is reaching a wider amount of people who could benefit greatly from said services. Over 2B people used smartphones worldwide in 2016.

This is because Angular 2 is integrated with NativeScript, the legendary open-source mobile framework that allows companies to develop amazing iOS and Android apps. Programmers can now use TypeScript, Angular 2, or JavaScript with NativeScript.

Use of TypeScript

Going back to Typescript (TS), (which we know is an incredible way to write JavaScript), which is the primary language in Angular 2, similar to Dart, other libraries and frameworks (ReactJS) uses TS as well. TypeScript, along with Dart, is a superset of JS. This alone makes implementing ReactJS and other libraries in your projects much easier and time productive.

For example, in the past, developers had to configure rails (within traditional MVC frameworks) to integrate reactJS into that framework. (Which was time-consuming.)

Writing components was also much more time-inclusive (and time-consuming) than HTML and JavaScript.

ReactJS is also NOT a full framework – as there is no router or model management library built directly into ReactJS. This meant beginners had a steep learning curve ahead of them.

Aside from TS, Angular 2 also provides people the opportunities to learn other, more time-beneficial languages such as:

  • Dart (which is worth studying for those interested in Web programming and apps)
  • ES5
  • ES6 (now known as ES2015)

This all-in-one (AIO) feature is incredibly time-persevering, and benefited many coders significantly.

One nifty feature lets you add type information to JS libraries (these are called declaration files). Those with an experienced background in Java programming language and C# should be well familiar with using TS, as they’re also given access to access modifiers and classes as is the case with Lambda expressions. This was one reason why so many people upgraded to the new programming platform almost in a heartbeat.

Say Bye-Bye to $scope and 1.X Controllers

To detect the changes $scope was used for, Angular 2 started using zone.js to detect those changes. Also worth noting is the fact, in Angular 2, “controllers” were replaced by “Components.” To give you a brief example, Angular 1.x Controller would be something along the lines of:

var myApp = angular

.module(“myModule”, [])

.controller(“productController”, function($scope) {

var prods = { name: “Prod1”, quantity: 1 };

$scope.products = prods;

});

And so on.

Thanks to Angular 2’s components, we would have the following:

import { Component } from ‘@angular/core’;

@Component({

selector: ‘prodsdata’,

template: ‘<h3>{{prods.name}}</h3>’

})

export class ProductComponent {

prods = {name: ‘Prod1’, quantity: 1 };

}

Again, it’s easy to see (almost immediately) how much more conducive and time-beneficial using components instead of controllers are. They also make component-based apps easier to define interfaces.

It is important to remember that components must always be used in tandem with one-way data-binding expressions.

Last Thoughts

With the full framework update, Angular JS (1.x) will be obsolete in the near future. Angular 2 is a beneficial upgrade for programmers who haven’t made the switch. Programmers and coders will be able to perform their exceptional duties at a much more convenient, efficient and time-saving pace.

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