Angular Module vs. Library vs. Application vs. Workspace

Angular Module vs. Library vs. Application vs. Workspace

Angular modules vs libraries including what is an an Angular library and what is an Angular module? The difference between workspaces, ...

Angular modules vs libraries including what is an an Angular library and what is an Angular module? The difference between workspaces, ...

The Angular CLI is a powerful tool for quickly generating Angular projects. Using the CLI, you can quickly generate components, services, directives etc. from the command line. The CLI also provides convenient commands for building, testing, and deploying your Angular apps.

With the release of Angular 6, the CLI introduced the concept of a workspace. A workspace is a collection of projects. These projects can be classified as either a "library" or an "application"....

But wait...doesn't the Angular CLI always generate applications? What makes a workspace different from an application? How is a library different from an application? Isn't an application just a module?

These are the questions many developers ask themselves when exploring the more recent versions of Angular CLI. Let's answer these questions in more detail....

What is an Angular workspace?

Angular 6 introduced the concept of a workspace. A workspace is really just a collection of different projects. The ng new command creates a new workspace...

ng new myworkspace

This will create a new workspace named myworkspace.

A WORKSPACE IS NOT AN APPLICATION

By default, ng new generates an application at the root of the workspace under the src/ folder.

This causes many to assume a workspace is an application. This is not the case! If you run...

ng new myworkspace

this will generate a new workspace without the src/ folder. By specifying --create-application=false, Angular CLI omits this default application from being generated.

So what's the point? Why would you generate a workspace that you can't deploy via some standalone application?

The concept of a workspace is really just an organizational thing. A workspace allows for multiple projects to be defined under a single angular.json configuration...

Why multiple projects? The Angular team realized that sometimes components, services, etc. can apply to multiple applications. To more easily share code across different apps, the concept of an Angular library was born...

What is an Angular Library?

A library is a collection of components, services, directives etc. that can be shared across different Angular projects.

You generate a new library just like you would a component, service or anything else:

ng new myworkspace

This will generate a new library mylibrary under the projects folder of your workspace.

FYI, if we wanted to create an application, we could also run:

ng new myworkspace

This will generate a new application mylibrary under THE SAME projects folder of your workspace.

Angular Library vs Application

Unlike an application, a library doesn't generate index.html, styles.css, polyfills.ts, main.ts. These files are specific to deploying an application in the browser. Since a library is simply a collection of reusable components, it doesn't need these files.

Additionally, a library generates a few files that an application doesn't. Let's look at these in more detail...

public_api.ts

This is the main entry file for your library. It defines what parts of the library are visible externally.

Whenever you add a new component, service, etc. to your library, you also want to add it to this file so it can be exported at the class level. While exporting a new component in your library's .module.ts file will make it visible externally, adding to this file makes it possible to reference the class instance itself like..

ng new myworkspace

ng-package.json

This file is the configuration for ng-packagr, a library for packaging Angular projects into a distribution-ready npm package. The Angular CLI utilizes ng-packagr for packaging and publishing your library as an npm package.

package.json

This file is specific to your library and represents the package.json file that will be included with your packaged library. This file tells ng-packagr what dependencies should be included with the package.json file for the packaged library.

Understanding the difference - angular.json

Remember that a workspace generates a single angular.json file. When you add either applications or libraries, their configuration gets added to the projects section of this file.

If you generate both a library and an application, you can compare the differences in their configurations. You'll notice an application has a lot more configuration for browser specific properties like index file location etc.

If you check out the architect' section for a library, you'll notice a build step definition that looks something like this...

ng new myworkspace

Conversely, an application's build step looks something like this...

ng new myworkspace

Look specifically at the "builder" attribute for these

ng new myworkspace

This points to the major difference between a library and an application. While applications build projects for the browser, libraries build projects with ng-packagr, making them reusable across projects.

It should be mentioned that simply building a library does not make it package ready. Running ng build on a library builds the project and compiles the output to a the dist/ folder.

To actually package the library, you would run something like this...

ng new myworkspace

What is an Angular Module?

You'll probably notice that both libraries and applications generate a @NgModule class defined in .module.ts file.

So what's the difference? Are both considered modules? What IS a module in Angular exactly?

A module is simply a way of organizing pieces of functionality together. While libraries and apps have their differences, they both represent collections of components, services, directives. A module is simply a way of defining how these elements work both internally and externally.

Modules both import and export functionality.

So why not just import modules to share functionality across apps? Why the need for libraries in the first place?

You aren't wrong by saying you can use modules to share components across projects.

Libraries just make this easier and more convenient, especially for packaging projects as "publishable" packages.

Also remember the KEY difference that a library also exposes functionality at the class level as per the public_api.ts file. To use a regular Angular application in the same way, you would manually need to define exports in a .ts file so external modules can reference the class object.

Wrapping up...

Understanding that a workspace is a collection of projects makes working with the CLI a lot easier. Since a workspace may have any combination of libraries/apps defined in the projects/ folder, it's important to specify projects when generating components, services, directives etc from the command line...

ng new myworkspace

By specifying the --project option, you tell the CLI which project to generate a new component for.

Conclusion

A workspace is a collection of projects. Projects can be either libraries or applications.

Both libraries and applications are modules a the end of the day. Their main difference is how they are built and deployed. A library can be packaged and published for easier reuse across projects. An application includes browser specific files for deploying and running in the browser.

Important reasons for developers to adopt Angular JS development

 Important reasons for developers to adopt Angular JS development

In the current scenarios, e-commerce companies are very keen to create an online impact. The web and app development market are at its peak of popularity. There is a high demand for web and app developers with a growing number of websites. Angular...

In the current scenarios, e-commerce companies are very keen to create an online impact. The web and app development market are at its peak of popularity. There is a high demand for web and app developers with a growing number of websites. Angular has been a top choice for web development and it's the latest version AngularJS has gained popularity in the industry. This java script framework has created its prominent position in creating web apps.
Regardless of whether there are numerous different systems accessible for web development, AngularJS can support among them all. Since its introduction in the market, Angular has been creating waves in the market.

Introduction

Angular js is a powerful framework that was developed by Google. It is used to build dynamic apps with power-packed features. It was first introduced in 2010 and created by developers at Google. This framework was created to simplify and remove the challenges in creating dynamic apps. It uses HTML, CSS, and java script to create dynamic single-page applications. Angular Js is inclusive of Mongo DB and it is a frontend fragment of Mean Stack. In the developer's community, Angular is considered as a reliable and fast Java script framework. Many popular apps like PayPal. You tube, Netflix, the guardian, Lego are built using the AngularJS framework.

In this blog, we are listing some compelling reasons to pick angular development to familiarize you with its potential

• Open-source framework: It is not a library but open-source frameworks that enable the developers to build well-performing single page web applications. Just after its launch, it became hugely popular among the developers and it is not going to come at a halt.

• Simplified MVC structure: Developers use AngularJS to build robust and interactive web applications. AngularJS framework uses MVC architecture to create interactive applications. AngularJS makes it easy for developers to create apps as they are only required to split the applications.

• Extensive community: As angular is built by Google, it is backed by a very large community of professionals. The Angular JS conferences of the professionals are held all over the world. Hackathons are also organized in IT communities that include some professional and skilled engineers who can help with the queries and questions related to Angular.

• Declarative code system: In Angular JS developers can create declarative patterns by using declarative paradigms. It enables developers to be less heavy, and easy to read. In this framework, the developers get data models that are not too complex to write that abolishes the need to use any getter/setters and with easy data manipulation.

• Two-way data binding: It is one of the impeccable features that makes Angularjs popular in the developers' community. It allows seamless projections of the models and data binding. In this framework, any changes in the user interface make an impact on the application objects. The developers are not required to fresh the cycle and that makes it vulnerable to bugs.

• Using directives: AngularJS makes use of Directives as the developers can build custom HTML tags that function as custom widgets and it can be possible using directives. Its implications are also in the case of the use of decorating components and manipulation of DOM elements in appealing ways.

• Enterprise-level testing: When using Angular JS there is no need for demanding any other supplementary framework or additional plugins. In the process, parts of applications are put in the angular framework which is not too complex for manipulation. In module separation, developers can load essential services in an effective way for the performance of automatic testing.

• Client-side situation: AngularJS mainly works at the client-side and it is fully compatible with both web and mobile browsers. It can function with any projects without the need for any backend notifications. The developers can easily use AngularJS for the front end of applications.

• Easy to use: AngularJS is rich with its features and facilitates developers to reduce any need for writing codes. It reduces the burden of developers by the application of MVC architecture and data models.

Many other significant features make AngularJS prioritize by the developers than other Javascript frameworks. The above-mentioned reasons have made it the top choice for reputed companies all across the globe for web development. Developers at the company master the skills to work with Angular JS development for web. The company is equipped with dedicated professionals having sound technical knowledge of working with AngularJS. We offer offshore services to extend our reach all across the globe with various models. We have more than 15 years of experience in the industry that we use to deliver high-quality solutions by leveraging the latest technology and quality standards.

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