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13 Best Advantages for Angular2 - [Angular 2 vs. Angular 1]

Why should you use Angular 2 ? What are the Advantages of Angular 2 ?
Angular 2 vs. Angular 1 Angular 4 vs. Angular 2 Angular 5 vs. Angular 4 Angular 6 vs Angular 5

The core differences and many more advantages on Angular 2 vs. Angular 1 as following,
1.     It is entirely component based.
2.     Better change detection
3.     Angular2 has better performance.
4.     Angular2 has more powerful template system.
5.     Angular2 provide simpler APIs, lazy loading and easier to application debugging.
6.     Angular2 much more testable
7.     Angular2 provides to nested level components.
8.     Ahead of Time compilation (AOT) improves rendering speed
9.     Angular2 execute run more than two programs at the same time.
10.  Angular1 is controllers and $scope based but Angular2 is component based.
11.  The Angular2 structural directives syntax is changed like ng-repeat is replaced with *ngFor etc.
12.  In Angular2, local variables are defined using prefix (#) hash. You can see the below *ngFor loop Example.
13.  TypeScript can be used for developing Angular 2 applications

14.  Better syntax and application structure





There are more advantages over performance, template system, application debugging, testing, components and nested level components.


For Examples as,

Angular 1 Controller:-
var app = angular.module("userApp", []);
   app.controller("productController", function($scope) {
   $scope.users = [{ name: "Anil Singh", Age:30, department :"IT" },
  { name: "Aradhya Singh", Age:3, department :"MGMT" }];
}); 

Angular 2 Components using TypeScript:-

Here the @Component annotation is used to add the metadata to the class.

import { Component } from 'angular2/core';
@Component({
  selector: 'usersdata',
  template: `<h3>{{users.name}}</h3>`
})
 
export class UsersComponent {
  users = [{ name: "Anil Singh", Age:30, department :"IT" },
  { name: "Aradhya Singh", Age:3, department :"MGMT" }];
}

Bootstrapping in Angular 1 using ng-app,
angular.element(document).ready(function() {
   angular.bootstrap(document, ['userApp']);
});

Bootstrapping in Angular 2,
import { bootstrap } from 'angular2/platform/browser';
import { UsersComponent } from './product.component';

bootstrap(UserComponent);

The Angular2 structural directives syntax is changed like ng-repeat is replaced with *ngFor etc.

For example as,
//Angular 1,
<div ng-repeat="user in users">
     Name: {{user.name}}, Age : {{user.Age}}, Dept: {{user.Department}}
</div>

//Angular2,
<div *ngFor="let user of users">
     Name: {{user.name}}, Age : {{user.Age}}, Dept: {{user.Department}}
</div>

Angular 2 Docs 

Introduction of Angular 2 Setup Angular 2 in .NET MVC Advantages of Angular 2
The Major Changes of Angular 2 Component Lifecycle Hooks Support of Modern Browsers
Angular 2 Vs. Angular 1 Angular 4 Vs. Angular 2 Constructors Vs. OnInit
Use of ngInit and ngOnInit ngOnInit() Vs. Constructors HTTP Cookies
Dependency Injection (DI) Inject() Vs. Injectable() Features and Benefits
Bindings in Angular 2Initialize an Array in Angular 2

Angular 4 and Angular 5 Fundamental Concepts

What's New in Angular 4? Why Use Angular 4?
What's New In Angular 5? What Is the Difference Between Angular 4 and Angular 5?
How to Setup Angular 4 Development Environment? What are differences between Angular 4 and Angular 2?



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