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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