How Does Angular Work?

How Does Angular Work?
A framework for creating client-side web apps is called Angular. Typically, TypeScript, HTML, and
CSS are used. The Angular framework's intriguing feature is that Google made it.
For the creation of client-side web applications, Angular offers developers robust tools. To create
stable and responsive single-page applications, Angular adheres to component-based architecture to
the letter (SPA).
But the main query is: How does Angular function? So far, we've covered a lot of specific information
regarding the processes involved in creating Angular applications.

What is Angular Framework?
Angular is a platform and framework made explicitly for
creating web and single-page apps. For creating reliable
online apps, Angular tightly adheres to the HTML template
language and is written in the TypeScript programming
language.
The Angular framework, a collection of TypeScript libraries,
is often used by developers working with AngularJS
development companies to provide core and optional
functionality.

Understanding Angular App Development Structure
Developers must thoroughly examine the workspace structure and application configuration used to
understand how Angular works.
Every Angular application functions as a workspace. By default, the ng new name_of_application
command generates a skeleton application at the workspace's root in the manner shown below.
workspace/(folder name is name_of_application given at cmd)
... (workspace-wide config files)
src/ --(source and support files for application)

Each application has its workspace, and the developers typically refer to this arrangement as a
"multi-repo" development approach. Additionally, the 'workspace' folder consists of workspace-
specific configuration files, whereas the 'src' folder consists of application-specific files and
folders.
Workspace Configuration Files:
● angular.json – The file manages the workspace and project-specific defaults for every
Angular build and development purpose. No matter how many npm packages the developers
have installed in the workspace, they need to specify the list of packages to be used when
they need them in your application in angular.json.
● package.json – This file includes the project’s metadata and plays an essential role in
managing the project’s dependencies, scripts, npm package versions and many more.

● package-lock.json – This file includes all the information related to npm packages installed
in the npm_modules folder. Some info like package version, hash to verify the package
integrity and list of its dependencies are included in the file.
● tsconfig.json – TypeScript is a language developers typically use to develop Angular apps.
This file specifies root files and compiler options required to compile our application.
Application Configuration Files:
● index.html – It’s the main HTML page rendered for the Angular application and displayed to
the user in the browser.
● main.ts – It’s an important file in the Angular application and is responsible for compiling all
components and template files with JIT(Just In Time) compiler. Moreover, the developers can
also use the Ahead Of Time compiler by adding the – aot flag to ng build or ng serve CLI
commands(Recommended for production environment).

How Does Angular Work?
A module in an Angular application is nothing
more than a collection of commonly used
components, directives, pipes, and services. To
effectively provide robust functionality, all of
these groupings interact with one another via
communication.
An extensive enterprise application is nothing
more than a collection of these built-in Angular
modules, such as the HTTP module (to make an
HTTP call from the application).

The eight Angular application building blocks that each developer commonly uses on a
daily basis are:
● Modules: For every Angular application, you will have only one root module named
AppModule. The module usually provides the Angular developers with the bootstrap
mechanism that makes it easy to launch the new application.
● Components: Like modules, every Angular project contains at least one component, the root
component. The primary role of the root component is to connect the component hierarchy
with a page document object model (DOM).
● Services: The Angular developers create a service class when no specific data or logic is
associated with the particular view. In addition, the developers can even share the data or
logic among different components. The @Injectable decorator immediately precedes the
service class definition.

● Templates: Angular templates are nothing but a combination of HTML and Angular markup.
The primary aim of such templates is to modify HTML elements before they are displayed
quickly. In addition, template directives provide program logic, and binding markup connects
your application data and the DOM.
● Metadata: Metadata is nothing but an instructor that informs Angular about how to process a
class. It is designed explicitly to decorate the class so that the developers can quickly
configure the expected behaviour of a class.
● Data Binding: The Angular data binding concept typically handles real-time communication
between a template and its related component. Moreover, data binding is also a boon for
communication between parent and child components.

● Directives: Angular components and directives are interconnected with each other. In simple
words, we can say that directives and components both are essential building blocks of
Angular applications.
● Dependency Injection: The primary role of the Angular developer is to keep the component
classes short and straightforward. And that’s what Dependency Injection (DI) does. DI is not
responsible for fetching data from a server, validating the user input, or logging directly into
the console.

Angular Bootstrapping Process
When an Angular application loads, that specific process is known as bootstrapping. Generally, the
Angular project file structure is divided into three categories:
● Application files
● Bootstrap files
● Configuration files
How a bootstrapping process works:
● With the help of the tsc TypeScript compiler, the compilation of application codes starts
● Webpack is used for bundling and minification of javascript files.
● The deployment and bootstrapping process take place.
● Run the JIT compiler for all components, directives and pipes.
● Render index.html in the browser.

Conclusion
Eventually, we can say that an Angular application is a tree to a component, and these components
are further enabled to add behaviour to UI through
● Services, Pipes, Directives, Dependency injection, and Modules
Such components are logical units of large applications, and numerous modules are connected to
create a stable Angular application.
Angular offers built-in modules, pipelines, and directives for some core and fundamental functions
by which we can develop our building blocks and connect them to create an enterprise-level
application.
Therefore, an Angular application functions as a component of trees connected to form modules
and an enterprise-level Angular application.

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How Does Angular Work?

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