Introduction
The dynamic web applications will be built using the popular framework of Angular. For beginners, Angular may seem too difficult to digest in first because it adds many new concepts and tools. But with a good step-by-step approach, you can make learning Angular much more fun! In this article, we’ll go through the Top 10 Angular Concepts For Beginners mind must know. These are the basic concepts that are going to help you create a solid overview of how to build web applications using this powerful framework.
Components
Components are the core building blocks of Angular. At the core of Angular applications are the components, which represent both the view (the visual representation) and the logic (the behind-the-scenes processing). Learn components: Components, at its core, are essentially classes that dictate the structure and behavior of a part of the UI.
Component Template: The HTML markup that belongs to the component. It determines the way the component is to be rendered on screen.
Component Class: Controls the logic of the component; Typescript Class It also includes properties and methods that control the data and behavior of the component.
Component metadata: The metadata will be the information angular uses to process the component. It’s given through a @Component decorator.
Learning about components is the first step to feeling comfortable with Angular. It’s important to understand how components talk to each other and how to structure them in your application.
Modules
So Angular applications can be organized using Modules. They are used to use them to bundle related components, services, directives, and pipes together into cohesive blocks of functionality. At least one module—the root module—exists in every Angular application.
NgModule: An NgModule is just a class with the @NgModule decorator. It provides Angular with the components, services, and other resources that should be used for the app.
Feature modules: Divide functionality around every feature of your app Module for user management, another for shopping cart functionality, etc.
It helps manipulate many modules as a beginner, so it’s easier to create and organize it appropriately to build maintainable and scalable applications.
Templates
Templates: In Angular, templates are HTML files with UI layout and structure of the application. The component is bound to the template, and the template for the component is obtained by Angular using data-binding techniques.
Interpolation: You can insert dynamic content into the template using {{ expression }} syntax.
Directives: Directives are the special markers in the template that change the appearance, behavior, or structure of the DOM. You have structural directives, such as the ngIf and ngFor, and attribute directives, such as the ngClass and ngStyle
Tags: Angular templates and DOM manipulation are key to displaying data properly in your app.
Data Binding
Data Binding is one of the most fundamental concepts within Angular. It’s the way to hook data from the component to the view (and vice versa). Angular has several types of data binding:
Data Binding: It can be one-way, meaning that the data flows from the component to the template (and vice versa). This is done with the help of interpolation, property binding, and event binding.
Two-Way Data Binding: It enables the communication between component and template. It does that with the help of the ngModel directive, which creates a two-way data binding by updating the model whenever the view changes, and vice versa.
Data binding will make it easier to update the UI when the data in the model changes, and for the app to be in sync with the model.
Directives
They are DOM markers that tell Angular to do something to a DOM element or a DOM element and its children. Directives are a core part of Angular because they provide a way of attaching behaviors to HTML elements. Two types of directives are present in Angular.
Structural: These change the DOM layout by adding or removing DOM elements Some that are commonly used are ngIf to conditionally include elements and ngFor to iterate over lists.
Attribute Directives: Changes the styling or behavior of an element. (For example, ngClass for adding/removing CSS classes, ngStyle for changing the element’s style.).
Learning about directives as a beginner would allow you to manipulate the DOM and also control the layout and styling for your app in a dynamic way.
In this article, we will primarily focus on how to use dependency injection similar to the way that the built-in services do.
They are classes whose purpose is to implement a particular functionality, like data handling, HTTP requests, and business logic. Generally, in Angular, services get injected into the other components and services through Dependency Injection (DI).
Services: Services do the heavy lifting, containing business logic or making calls to a back-end server, which helps you keep your components lean and mean, containing just UI.
1st is Dependency Injection: The DI is a design pattern with the help of which the component or service can get its dependencies (for example services) by automatic injection.
Proper use of services and understanding of DI will help you build modular, reusable, and maintainable Angular applications.
Routing
Routing is an important feature of Angular that lets you navigate between various component views in your application. The Angular router allows you to build Single Page Applications (SPAs), where the view only refreshes based on interaction preventing the whole page from reloading.
Route Config: You configure routes in the app that link to specific components via URLs. The user travels between different paths in the application through these routes.
Routing: After defining routes, the Angular’s router displays the right component when the user goes to a route.
If you want to create a multi-page application where the user can switch between different sections of the app without a full-page refresh, understanding routing is important.
Pipes
Reference: https://angular.io/api/common/PipeTransform They enable you to format and render the data in the desired format but do not change the data in the component. Angular has predefined pipes as part of the framework, but you can build your own too.
What are Angular Pipes Built-in pipes: Angular comes with a lot of built-in pipes for standard tasks like formatting dates, numbers, and currencies. A few of them are DatePipe, CurrencyPipe, and UpperCasePipe.
Custom Pipes: You can create your own custom pipes to handle specific transformations if the built-in pipes do not meet your needs.
Pipes will help you better demonstrate the data and allow you to keep your components clean.
Forms
Forms are an essential part of any web application. Angular has two ways to Create Forms in it — Template-driven Driven Forms and Reactive Forms.
Template-Driven Forms: These are simpler forms with the dependence on Angular’s two-way data binding. They help with simple forms that don’t need any complex logic.
Reactive Forms: Reactive forms are easier and more flexible in comparison. They are defined inside the component class, which provides you with greater control over the form behavior, including validation and the ability to update the form controls dynamically.
Forms are an essential concept, especially when you need to input and validate sets of user inputs, so understanding forms and their respective approaches is something you have to familiarize yourself with as early as possible.
Event Handling
In Angular, event handling is listening for user actions such as clicks, keystrokes, and other interactions. Events can be very easily bound to methods in the component class with Angular.
Event Binding: We can bind events to the methods in your components using (event) syntax. Enabling You to React to Someone Interacting with Your App– Clicking Button or Submitting a Form, and so on.
Event Handling Methods: After an event is triggered, Angular invokes the relevant method in the class of the component. They deal with the logic to respond to the event: update data, update view, etc.
As an advanced topic, mastering event handling is an important concept for creating interactive applications, where the user’s actions will cause a change in the state or appearance of the application.
Conclusion
AngularJS is one of the most powerful frameworks for building Powerful web applications. These 10 concepts (components, modules, templates, data binding, directives, services, routing, pipes, forms, and event handling) are the foundation for building any Angular application. You explore more of Angular as you move along, gaining further understanding of these concepts and how you can put them together to build complex, high-performance web applications.
You will feel more comfortable with Angular the more you practice and apply these concepts. [Keep Building, Stay Curious, and Remember: Every concept you master is one step closer to becoming an Angular Expert!
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