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    Angular vs Angular 2 : Why You Should Discuss Before Choosing One

    Angular is the most popular JavaScript frameworks of 2019. Today we are discussing mostly asked Angular vs Angular 2 which one developer should choose… Stay Tune till the end! 

    The world is evolving rapidly from the past few years. The sector has been through so many innovations, but all of that came at a cost of developer convenience. Concerning the Angular, it was developed in a time where web technologies like Javascript, HTML, etc were just in the initial stage of its evolution. The core ideas, which were implemented were ahead of their time, and many of them have now become international standards.

    So, the developers had to make a choice that will they stuck up with their current architectures and attempt to mold them over the new standards or they just start from scratch building around the new standards.

    Also, AngularJS and Node.js are the most popular JavaScript frameworks but it is hard to know which one to choose for web application development and business. if you are thinking for creating a web app by using angularjs, then first you need to know whether This is SEO friendly or not.

    As a result, Angular 2 came in sight in mid-2016. Their uses Hierarchical Dependency Injection system, which is the main performance booster of the framework. It works by implementing unidirectional tree based change detection, which also works as a performance booster.

    According to the developers, the Angular 2.0 is 5 times faster than its previous version and is also a huge learning curve for developers. It is completely developed in Typewrite and also meets the ES6 specification. You must not fall in the misconception that it is an update for Angular, It is completely rewritten and includes many changes.

    Before getting into differences also check out Angular 4 new features and how to upgrade from Old One 

    Difference: Angular vs Angular 2

    Let’s have a look at the differences between Angular and Angular 2

    • Angular 2 is mobile oriented and better in performance

    Angular 1 was introduced long ago and was not built with mobile support in mind, whereas, being introduced in the current era, the Angular 2.0 comes features mobile support.

    The Angular 2 uses Hierarchical Dependency Injection system and implements unidirectional tree based change detection, which acts as a major performance booster for the framework.

    According to the developers, Angular 2 is 5 times faster than Angular 1.

    • Angular 2 offers more choices for languages

    Angular 2 offers more choices for languages such as ES5, ES6, TypeScript or Dart for writing codes, whereas, the Angular 1 only offers ES5, ES6, and Dart for writing codes. Using of Typescript is a recommendable step, as it is an awesome way to write Javascript codes.

    • Angular 2 implements web standard like components

    It implements web standard like components and provides better performance than Angular

    • Angular 2 is not easy to set up as Angular 1

    Angular 2 is a bit complicated to set up as compared to Angular. In Angular, you just need to add reference of a library to get started, whereas, the Angular 2 is totally dependent on additional libraries and requires efforts to set it up.

    Angular:

    Angular 2:

    • Angular 1 controllers and $scope are gone

    The controllers and $scope in Angular 1 have been replaced with “Components” in Angular 2. Hence we can say that it is a component-based framework, which uses zone.js to detect changes.

    Angular controllers: 

    var myApp = angular.module('myApp',[]);
    
    myApp.controller('GreetingController', ['$scope', function($scope) {
     $scope.greeting = 'Hello!';
    }]);

    Angular 2 Components:

     <h1>{{title}}</h1> <h2>My Heroes</h2> <ul class="heroes"> <li *ngFor="let hero of heroes" [class.selected]="hero === selectedHero" (click)="onSelect(hero)"> <span class="badge">{{hero.id}}</span> {{hero.name}} </li> </ul> <hero-detail [hero]="selectedHero"></hero-detail> `,
    • Different ways to define local variables

    In Angular 2, the ways of defining local variables have been changed a bit as compared to the Angular. The Angular 2 now uses Hash (#) prefix to define local variables.

    <div *ngFor="#SAGIPL of sagipl">
    
    • Structural directives syntax is changed

    Structural directives syntax has been changed in the Angular 2. For example, ng-repeat has been replaced with ng for.

    • Angular 2 uses camelCase syntax for built-in directives

    CamelCase syntax is used in the Angular 2 for built-in directives. For example, ng-model has been changed to ngModel and ng-class in now ngClass.

    Angular structural directives:

     <ul>
     <li ng-repeat="framework in frameworks">
     {{framework.name}}
     </li>
    </ul>

    Angular 2 structural directives:

    <ul> <li ng-repeat="#framework in frameworks"> {{framework.name}} </li> </ul>