What is Angular? Learn Angular step by step

Introduction

The Angular is a JavaScript framework for building client-side applications. using HTML, CSS, and a programming language such as JavaScript. Angular makes our HTML more expressive. So, angular powers up our HTML with features such as if conditions, for loops, and local variables. Angular has powerful data binding. It can display fields from our data model, track changes, and process updates from the user. Angular promotes modularity by design. Our applications become a set of building blocks, making it easier to create and reuse content, and Angular has built-in support for communication with a backend service. This makes it easy for our web applications to integrate with a back-end service, to get and post data or execute server-side business logic.

Overview

The Angular provides a consistent set of patterns. for creating components, templates, modules, and services helping you come up to speed quickly. after that, you’ll understand how to build components, create the user interface for your application in a template. and power it up with data binding and directives.

It discovers how to build services for logic needed across components and inject those services where they need. and step by step understands how to send requests to a web server using HTTP and observables. and also see how to set up routing to navigate between the views of your application. In addition, you’ll see how to use the Angular command line interface or CLI to generate, execute, test, and deploy your Angular application.

Whether you are new to Angular or migrating from AngularJS, you want to come up to speed quickly. with Angular’s components, templates, services. and also provides the basics you need to get started building an Angular application. the step by step
you will understand, what is a component? Where do we put the HTML for our user interface? When should we use data binding? Why do we need a service? And How do we build an Angular application?

Why did we need a new Angular?

The Angular is so very popular with millions of developers already using AngularJS, Angular is built for speed. It has faster initial loads, improved rendering times and faster change detections. Angular is modern. It takes advantages of features provided in the latest JavaScript standards. and beyond such as classes, modules, and decorators, yet it supports both Greenfield and Legacy browsers. Angular has a simplified API, it has fewer built-in directives to learn, simpler bindings, and a lower concept count. Angular enhances our productivity to improve our day-to-day workflow.

Structure of an Angular Application

In Angular, an application is comprise of a set of components and services. that provide functionality across those components.

Structure of an Angular Application

So, what is an Angular component? Each component comprise of a template which is the HTML for the user interface fragment defining a view for the application. include to that a class for the code associated with the view. The class contains the properties or data elements available for use in the view and methods. which perform actions for the view such as responding to a button click. the component also has metadata, which provides more information about the component to Angular. the metadata identifies the class as an Angular component.

angular components

So, a component is a view defined with a template. it’s associated code defined with a class, and more information, defined with metadata. The Angular modules help us organize our application into cohesive blocks of functionality. Every Angular application has at least one Angular module called the application’s root Angular module. An application can have any number of more Angular modules including feature modules. that merge the components for a specific application feature.

Angular root module

Prerequisites

Basic knowledge of

1] JavaScript for code
2] HTML for building the user interface
3] Cascading style sheets or CSS for styling.

It is helpful if you have some exposure to object-oriented programming concepts. through coding with C++, C#, Java, or PHP, but if you don’t have any exposure to OOP, that’s okay. You do not need any prior knowledge or Angular or TypeScript.

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