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I am working on the Angular 2 documentation.
A lot of places, including the examples, Angular is referred to as @angular.
For example, on the API page:
https://angular.io/docs/ts/latest/api/
What is the significance of the @? Does it have any relevance to Angular 2 code?
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Angular (commonly referred to as "Angular 2+") is a TypeScript-based free and open-source web application framework led by the Angular Team at Google and by a community of individuals and corporations. Angular is a complete rewrite from the same team that built AngularJS.
Some Important Features of Angular 2 are:Modern, faster, and highly scalable framework. Equally useful framework for web, mobile, and desktop apps. Web components based architecture. Supports Hierarchical Dependency Injection.
is the latest version of Angular. Although Angular 2 was a complete rewrite of AngularJS, there are no major differences between Angular 2 and Angular 4. Angular 4 is only an improvement and is backward compatible with Angular 2.
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.
It's the name used for the scope in the NPM repository
http://blog.npmjs.org/post/116936804365/solving-npms-hard-problem-naming-packages
@angular is the scope name and all modules (core, compiler, common, platform-..., testing, router, ...) are published under that scope.
Angular2 versions after beta.x, and therefore >= Angular2 RC.0 use @angular
Versions <= Angular2 beta.x use angular2
One of the reasons they changed it that they considered 2 in Angular2 a misnomer. Currently (January 2017) we are at Angular version 4.0.0-beta.1 which should make it clear, that 2 doesn't make sense.
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