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Angular 2 applications have the option of error handling. This is done by including the ReactJS catch library and then using the catch function. Routing helps in directing users to different pages based on the option they choose on the main page. Hence, based on the option they choose, the required Angular Component will be rendered to the user. In Angular 2, it is also possible to carry out manual navigation.  Angular 2 can also design forms which can use two-way binding using the  ngModel  directive. Command Line Interface (CLI) can be used to create our Angular JS application. It also helps in creating a unit and end-to-end tests for the application. Dependency injection is the ability to add the functionality of components at runtime. The target for the compilation is es5 and that is because most browsers can only understand ES5 typescript. The sourceMap option is used to generate Map files, which are useful when debugging. Hence, during development ...
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Lets know about Directives in angular 2 Directive in a easy language is a custom HTTM Element Angular 2 has the following directives that get called as part of the BrowserModule module. ngif ngFor Metadata is used to decorate a class so that it can configure the expected behavior of the class. Following are the different parts for metadata. Annotations  − These are decorators at the class level. This is an array and an example having both the @Component and @Routes decorator. Design:paramtypes  − These are only used for the constructors and applied only to Typescript. propMetadata  − This is the metadata which is applied to the properties of the class.
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Angular 2 Architecture

Simple is to know Angular 2 architecture: it consists of 1) components 2) Services Component is further divided into: 1) Template 2) Class 3) Meta data Root angular module contains components again!! Syntax of Template: templateURL: viewname.component.html
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Angular 2 is an open source JavaScript framework to build web applications in HTML and JavaScript. Features of Angular 2: 1)Components 2) TypeScripts 3) Services Components of Angular 2: 1)Modules 2)Components 3)Typescript 4) Meta Data  5) Services Key components of Angular 2 to be installed are: 1) NPM 2)GIT 3) Editor -To work on NPM Component, you need to install npm editor install visual studio code, GIT --COMMAND PROMPT-- Click on project directory for Git - go to components - then deployment -use npm Now what are the modules used ?? 1)Bootstrap array 2)Export array 3) Import array
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