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Angular 8 tutorial: Step by Step

Angular 8 is an updated version of Angular, with new aspects, an improved feature list, and a host of workflows preferred by Angular developers. You can start learning Angular 8 at home with an Angular 8 tutorial for beginners.

This article will discuss the functions and features of Angular and Angular 8 to learn its framework from scratch. 

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What is Angular?

Angular is a client-side, Java-script-based, open-source framework for developing web-based applications, preferably used for creating dynamic Single Page Applications or SPA. To summarise, Angular is:

  • An MVC-based structured framework
  • A framework to develop Single Page Applications (SPA)
  • Supports client-side templating features
  • Provides code testing before deployment

What is Angular 8?

Angular 8 is a client-side TypeScript-based structure framed to produce dynamic web applications. The first version of Angular in 2012 was called AngularJS. Angular 8 is the latest version, equipped with an excellent User Interface (UI) Library. 

The User Interface (UI) component of Angular 8 is highly efficient in constructing functional, attractive, and consistent web applications and web pages. This framework comes with a tree structure containing parent and child components. 

Angular 8 framework helps create responsive websites, allowing web pages to fit any screen size, with extensive device compatibility, including mobiles, tablets, large systems, and laptops. 

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What do you understand by Single Page Applications (SPA)

A Single Page Application (SPA) is a web application or website that rewrites the current page with updated content without loading new pages from the server.

Single Page Application (SPA) sends data for user interactivity, and the browser renders it to deliver results. The rendering behaviour is quite different from a traditional method which requests to re-render an entire page, but SPA renders it on request with a click. By following the SPA approach, you can enhance the performance of any web application. 

How to upgrade to Angular 8?

If you wish to update your outdated Angular framework to Angular 8, run the given command for an easy update.

Ng update @angular/cli @angular/Core

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What’s unique about Angular 8?

Angular 8 contains fresh as well as upgraded versions of previous features. Some of these are:

  • Ivy Renderer Engine Support – the new compiler of Angular 8
  • Typescript 3.4 or above support
  • Dynamic module loading concept
  • New build tool Bazel 
  • Differential loading for optimising performance
  • Supports SVG template
  • Supports Web Worker
  • Improvement of ngUpgra

What are the installation prerequisites for Angular 8?

Install the mentioned prerequisites for the Angular 8 environment:

  • Typescript version 3.4 or above
  • Latest Node JS, LTA 10.16 or above
  • Any IDE like Microsoft Visual Studio 2015 or above or Visual Studio Code 
  • Angular CLI for running the Angular project 

The Architecture of Angular 8

Angular 8 integrates core functionality as TypeScript libraries to introduce in the application. Angular 8 application is made of essential building blocks known as NgModules, providing a compilation context for the components. In addition, there is a root module in Angular 8, which enables bootstrapping. 

Some essential parts of Angular 8 architecture are as follows:

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1. Templates 

The Angular template includes HTML with Angular mark-up, which modifies the HTML elements before displaying it. It provides program logic and binds the mark-up connecting the DOM and application data. 

Example:

<div style=“text-align: center”>

<h1>

{{2| power: 5}}

</h1>

</div>

This HTML file has used a template and pipe inside it to convert the values to their desired output. 

2. Modules

Angular 8 NgModules vary from other JavaScript modules. Each Angular 8 app can provide a bootstrap mechanism for application launch. Some features of Angular 8 modules are:

  • NgModules enables functionality to be imported and used by other modules. For instance, if you want to use the route service in the app, you can import the Route Ng module. 
  • NgModules import functionality from other NgModules. Example – JavaScript modules

3. Components

Components are the building blocks of the Angular 8 framework. Each component defines a class, which contains logic, data, and application, to bind with the HTML template. 

4. Data binding

Angular makes communication between a DOM and a component. It simplifies the interactive application framework without pushing and pulling data. There are two types of data binding:

  • Event binding – The app responds to the user input in the target environment by an application data update. 
  • Property binding – It interpolates values computed from application data into HTML.

5. Meta-data

In Angular, decorators work as the Metadata. Its primary function is to enhance the class to configure the class’s expected behaviour. For example, users can use Metadata in a class, so the Angular app knows the app component is a component. In addition, metadata can be attached to TypeScript with the decorator. 

6. Services

The purpose of using services is to reuse the code. Standard services are created for the codes applicable to more than one component. The decorator provides the meta-data, which permits injecting services into the client component as a dependency. The Angular differentiates a service and element to increase modularity and reusability. 

7. Directives 

Directives aim to expand HTML elements’ working functionality. There are three kinds of available directives in Angular – Attribute Directives, Structural Directives and Component Directives. 

Besides in-built directive, you can create your directive by developing a JavaScript class and applying the @Directive attribute to it. Then, put the behaviour in the class per your business requirements. 

8. Dependency Injection (DI)

Dependency Injection in Angular enhances efficiency and modularity. Dependency Injection will not validate user input or fetch data from the server or log directly to the console. Instead, it forwards such jobs to Services. 

Conclusion

Angular 8 is a highly accessible solution with its sole focus on technological trends. With frequent updates, the Angular framework continues to become efficient and a preferred platform for web developers. 

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How long does it take to learn Angular 8?

It takes around 2 to 3 months to learn Angular 8 if you are ready to spend a minimum of 3 to 4 hours every day. Core concepts are essential to learning Angular 8. An efficient Angular 8 tutorial for beginners can help you learn crucial concepts of the framework.

Is it possible to learn Angular without knowledge of JavaScript?

It is essential to know JavaScript before learning Angular. Angular and Angular 8 both require understanding JavaScript fundamentals.

Can Angular 8 boost my IT career?

Yes! Front-end and full-stack developers with Angular 8 knowledge are being widely sought after in the IT industry; therefore, knowing Angular 8 will boost your career.

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