#angular 7 reactive forms two way binding

[transcuratorsblog]

Top Front-End Frameworks Web Development Companies Use in 2025

The front-end landscape continues to evolve rapidly, with user expectations pushing web applications to be faster, more interactive, and visually seamless across devices. In 2025, choosing the right front-end framework is a strategic decision that impacts performance, scalability, and developer efficiency. That’s why every seasoned Web Development Company evaluates and adopts frameworks that align with both technical requirements and user experience goals.

From enterprise-grade portals to dynamic eCommerce platforms and progressive web apps, front-end frameworks power the interface users directly engage with. Below, we explore the top front-end frameworks dominating the web development space in 2025—and why agencies rely on them.

1. React.js

Still the industry favorite in 2025, React continues to dominate front-end development. Backed by Meta (Facebook), React is a component-based JavaScript library for building fast, interactive UIs.

Why companies use it:

Strong community support and third-party integrations

Highly reusable components and custom hooks

Great compatibility with backends and headless CMS

Ideal for SPAs, PWAs, and enterprise dashboards

Bonus: React also powers frameworks like Next.js, which brings SSR (server-side rendering), static site generation, and improved SEO to the React ecosystem.

2. Vue.js

Vue has steadily gained popularity thanks to its simplicity, performance, and developer-friendly design. In 2025, Vue 3—with its Composition API and improved TypeScript support—makes it a strong choice for mid-scale projects and agile teams.

Why companies use it:

Lightweight and easy to learn

Reactive two-way data binding

Great for progressive migration in legacy apps

Vue CLI and ecosystem tools enhance productivity

Ideal for: SaaS applications, admin panels, and interactive marketing sites.

3. Next.js

Although technically a framework built on React, Next.js deserves a separate mention due to its dominance in building high-performance, SEO-friendly web applications.

Why companies use it:

Built-in support for SSR, SSG, and ISR

Seamless routing and dynamic page generation

API routes for backend-like features

Excellent for headless CMS integrations and eCommerce

Trend in 2025: Many Jamstack-based websites now rely on Next.js paired with GraphQL and CMS tools like Sanity or Strapi.

4. Svelte & SvelteKit

Svelte takes a unique approach—it compiles your code at build time, eliminating the need for a virtual DOM. The result? Ultra-fast and lightweight apps with excellent runtime performance.

Why companies use it:

Less boilerplate code, clean syntax

Faster load times and smaller bundle sizes

SvelteKit brings routing, server-side rendering, and file-based API integration

Use case: Startups looking for speed, performance, and simplicity in modern SPAs.

5. Angular

Angular, maintained by Google, remains a staple in enterprise web development in 2025. While it's more complex and opinionated than React or Vue, it provides everything out of the box—from routing and state management to HTTP clients and dependency injection.

Why companies use it:

Built-in tooling for testing, forms, and HTTP

TypeScript-first architecture

Great for large-scale, complex applications

Best for: Enterprise-level apps with large teams and strict development protocols.

6. Remix

Remix is a relatively new but rapidly adopted React framework focusing on performance, nested routing, and better use of the browser’s native capabilities. In 2025, many agencies use Remix for building dynamic, data-driven apps with great SEO and loading speed.

Why companies use it:

Streamlined data loading methods

Improved error handling

Great SEO out of the box

Works well with modern APIs and backends

Gaining ground: Especially among React teams seeking an alternative to Next.js.

7. Astro

Astro is one of the rising stars in front-end frameworks as of 2025. It allows developers to ship zero JavaScript by default and only hydrate interactive components as needed. It supports multiple frameworks (React, Vue, Svelte) in the same project.

Why companies use it:

Partial hydration = faster sites

Ideal for content-heavy sites and blogs

Headless CMS integration is seamless

Perfect for: Static sites, marketing pages, and performance-first websites.

Final Thoughts

The front-end frameworks used in 2025 reflect a shift toward performance, flexibility, SEO-friendliness, and developer ergonomics. Whether you're building a blazing-fast content site or a complex dashboard, the right framework accelerates development, improves UX, and ensures scalability.

Partnering with a forward-thinking Web Development Company ensures that your project is built using the best-suited technology stack. These experts evaluate your business needs, future scalability, SEO requirements, and user expectations to recommend the optimal front-end framework—ensuring your digital product doesn’t just look good, but performs exceptionally.

[monopolytraininginstitute]

Unlocking the Power of Angular: A Guide to Modern Web Development

Introduction

Angular is a cutting-edge web development framework designed by Google to build interactive and high-performance web applications. As an advanced front-end technology, Angular offers a structured approach to application development, making it a go-to choice for developers worldwide.

What Makes Angular Stand Out?

Angular is a TypeScript-based framework that facilitates the creation of robust and scalable web applications. With its powerful tools and features, developers can efficiently build dynamic single-page applications (SPAs) that offer a seamless user experience.

Core Features of Angular

1. Component-Driven Architecture

Angular applications are built using a component-based structure, where each component is a modular and reusable unit. This promotes better organization, maintainability, and scalability of applications.

2. Efficient Data Binding

Angular employs two-way data binding, ensuring instant synchronization between the model and the view. This reduces the need for excessive code, streamlining the development process.

3. Dependency Injection

A robust dependency injection system allows Angular applications to manage services efficiently, making the code more modular and testable.

4. Enhanced HTML with Directives and Pipes

Directives help extend HTML’s capabilities, while pipes transform and format displayed data, offering flexibility and ease of manipulation in the user interface.

5. Seamless Navigation with Built-in Routing

Angular’s built-in routing module enables smooth transitions between different sections of a single-page application, eliminating unnecessary page reloads.

6. Advanced Form Handling and Validation

Angular supports both template-driven and reactive forms, allowing developers to implement structured form validation and user input management effortlessly.

7. Angular CLI for Streamlined Development

The Angular Command Line Interface (CLI) automates repetitive tasks, helping developers create, test, and deploy applications efficiently.

Why Choose Angular for Your Development Needs?

High Industry Demand

Many companies rely on Angular for their web applications due to its ability to handle complex functionalities with ease, making it a valuable skill for developers.

Versatility Across Platforms

Angular can be used to develop progressive web applications (PWAs), enterprise software, and mobile applications using frameworks like Ionic.

Strong Developer Community and Support

Backed by Google and a large community, Angular offers extensive documentation, frequent updates, and continuous improvements, making it future-proof.

Best Practices for Angular Development

Use Lazy Loading to enhance application speed by loading resources only when required.

Adopt a Modular Approach to improve code maintainability and scalability.

Utilize State Management tools such as NgRx to manage application states efficiently.

Optimize performance with Ahead-of-Time (AOT) Compilation, reducing page load times.

Strengthen Security Measures by preventing cross-site scripting (XSS) and other vulnerabilities.

How to Master Angular Effectively

To get started with Angular, it’s essential to have a foundational understanding of JavaScript and TypeScript. Engaging in practical projects, enrolling in structured courses, and leveraging online tutorials can significantly improve learning outcomes.

If you are searching for the best Angular training institute in Hyderabad, ensure that the course provides hands-on training, real-world applications, and expert guidance.

Conclusion

Angular remains a dominant force in modern web development, providing developers with the tools needed to create interactive and scalable applications. Learning Angular opens doors to exciting career opportunities in the tech industry. To gain expertise in this powerful framework, consider enrolling in a professional training program. Monopoly IT Solutions offers comprehensive Angular training, equipping learners with the skills needed to excel in the competitive job market.

[korshubudemycoursesblog]

Accelerate Your Learning: Master Angular 18 and ASP.NET 8.0

The ever-evolving world of web development has made Angular 18 and ASP NET 8.0 crucial for modern developers. Mastering these technologies not only equips you to build dynamic web applications but also accelerates your learning in an industry that demands constant innovation. This blog will guide you through Angular 18 and ASP NET 8.0 while providing top trends and essential keywords to help you stay ahead.

Why Learn Angular 18 and ASP NET 8.0?

Angular 18 is the latest version of the popular front-end framework developed by Google. It continues to be a favorite among developers because of its two-way data binding, component-driven architecture, and modular approach. Meanwhile, ASP NET 8.0, developed by Microsoft, offers a robust framework for building dynamic web applications with a focus on speed, flexibility, and scalability.

By mastering these two powerful frameworks, you can:

Build efficient, responsive, and user-friendly applications.

Develop cross-platform solutions with enhanced performance.

Utilize a broad range of libraries and tools available in the Angular ecosystem and ASP NET.

Key Features of Angular 18

The leap from Angular 17 to Angular 18 introduces several exciting features:

Enhanced Server-Side Rendering (SSR): Angular Universal makes it easier to render pages on the server for faster loading times.

Improved Ivy Rendering Engine: Angular 18 optimizes performance and offers better code-splitting capabilities.

Strict Typing: TypeScript integration has been upgraded to provide stricter typing, making Angular 18 more robust and developer-friendly.

Tailwind CSS Integration: Full support for Tailwind CSS allows for more efficient styling of applications.

RxJS 7 Compatibility: Reactive programming is now easier, with RxJS 7 natively supported, streamlining complex tasks like state management and data streams.

What’s New in ASP NET 8.0?

ASP NET 8.0 brings major updates to developers focused on building web APIs, blazing-fast web applications, and microservices:

Performance Boost: ASP NET 8.0 delivers even faster processing speeds than its predecessors, thanks to improvements in the Kestrel web server and gRPC.

Minimal APIs: The simplicity of defining APIs has been enhanced, allowing developers to build APIs faster and with less code.

Blazor Enhancements: Blazor, a feature of ASP NET for building interactive web UIs, sees enhanced WebAssembly support and improved server-side rendering.

Cross-Platform Compatibility: ASP NET 8.0 fully supports containerized applications, making it a favorite for DevOps workflows and microservices architecture.

Accelerate Your Learning with Project-Based Approach

While reading articles and documentation can provide valuable insights, nothing accelerates your learning more than working on real-life projects. Here's a structured learning path for Angular 18 and ASP NET 8.0 that can help you gain hands-on experience.

1. Build a Personal Portfolio with Angular 18

Start by creating a personal portfolio website using Angular 18. This project will allow you to:

Implement component-based architecture.

Use Tailwind CSS for modern and responsive design.

Handle form validations and input binding.

Practice routing and state management using RxJS.

2. Develop a Blog Platform with ASP NET 8.0

Once you’re comfortable with Angular, dive into ASP NET 8.0 by building a blog platform:

Set up RESTful APIs using Minimal API.

Learn how to implement authentication and authorization with ASP NET Identity.

Use Entity Framework Core 8 for database management.

Implement real-time functionalities using SignalR.

3. Full-Stack Application: Combine Angular 18 and ASP NET 8.0

Finally, put everything together by developing a full-stack application. You could build a task management system or an e-commerce platform where you:

Use Angular 18 for the front-end UI.

Handle backend processes like authentication and data management using ASP NET 8.0.

Deploy the full application using Docker containers for a cloud-ready solution.

Key Concepts to Master in Angular 18 and ASP NET 8.0

Angular 18:

Reactive Forms: Master reactive forms for robust form validation and input handling.

Dependency Injection (DI): Utilize Angular’s DI system for managing services.

Change Detection: Learn how Angular's change detection works to optimize performance.

ASP NET 8.0:

Middleware: Learn how to use middleware to handle HTTP requests and responses.

Authentication with JWT: Implement JWT-based authentication for secure APIs.

Dependency Injection in ASP NET Core: Like Angular, ASP NET also utilizes DI extensively, making it a crucial concept to master.

Best Resources for Learning Angular 18 and ASP NET 8.0

When learning Angular 18 and ASP NET 8.0, choosing the right resources can be a game-changer. Here are some top suggestions:

Udemy Courses: Courses like "Master Angular 18 and ASP NET 8.0" provide an in-depth understanding of both frameworks.

YouTube Tutorials: Channels like Academind and Net Ninja offer free yet comprehensive tutorials.

Official Documentation: Always refer to the official documentation of Angular and ASP NET for up-to-date information.

Forums and Communities: Engage in communities like Stack Overflow, Reddit, and GitHub to ask questions and get help.

Frequently Asked Questions (FAQs)

What are the benefits of mastering Angular 18 and ASP NET 8.0?

Mastering Angular 18 and ASP NET 8.0 provides a comprehensive skill set for full-stack development, enabling you to build responsive, scalable, and high-performance web applications.

How long does it take to learn Angular 18 and ASP NET 8.0?

Depending on your current knowledge and time commitment, it can take 3-6 months to become proficient in both frameworks.

Can I use Angular 18 and ASP NET 8.0 for mobile app development?

While Angular 18 is primarily used for web applications, it can be integrated with Ionic to develop mobile apps. Similarly, Blazor, part of ASP NET 8.0, allows for cross-platform app development.

Conclusion

Mastering Angular 18 and ASP NET 8.0 opens doors to a wide range of opportunities in the world of web development. Whether you're aiming to build complex web applications or simplify your development process with cutting-edge frameworks, this combination is your gateway to success. By following this guide and incorporating the right keywords like "Accelerate Your Learning: Master Angular 18 and ASP NET 8.0", you'll stay relevant and competitive in the ever-changing landscape of web development.

Take the next step in your learning journey, start building projects, and accelerate your learning to become a master of Angular 18 and ASP NET 8.0.

[airman7com]

Angular 7 Reactive – Form Validation Simple Example

Every application requires user input and the input must be correct that is the developer’s responsibility. Angular 7 comes with the form validation feature.

Today we will learn about the validation of the 7 Angles form.

So let’s start with a simple registration form validation. We need a 7 Corner project. If you don’t know how to create an Angular project 7. Follow this tutorial.

Register the…

[chaudharyglasspack23]

React JS compare to Angular 2

React JS compared to Angular 2

A while back, we wrote a piece comparing Angular 2 and react. In that piece, we outlined the advantages and disadvantages of different frameworks and offered recommendations for what to select in 2017 depending on the situation. So, how is the front-end garden faring in 2018?

Because JavaScript frameworks are evolving so quickly, today's versions of Angular, ReactJS, and another contender on the market, Vue.js, are regularly updated. Let's take a look at the demand as it has been reflected in Google Trends over the past five years. Angular, React, and Vue.js are each represented by a blue, red, and yellow line.

The graph demonstrates that between 2013 and 2014, there was a slight variation in the number of React and Angular questions. Then, we observe that the difference between them grew for a brief time. From the middle of 2016, these demands were balanced, and

React began to expand and become closer to meeting Angular needs

. Although the Vue.js framework was still not very well known, it was slightly increasing its market share among frameworks, indicating the potential for future growth. In recent years, Angular and React have become nearly evenly matched, making them the most practical front-end frameworks available.

ReactJS's benefits and drawbacks

ReactJS is a JavaScript toolkit that Facebook released as open source in 2013 and is excellent for creating large web apps with often changing data.

Advantages of ReactJS

simple to learn. Due to its straightforward syntax, React is significantly simpler to learn. All engineers need to do is recall their HTML authoring abilities. No need to fully understand TypeScript, as with Angular.

The highest degree of reactivity and flexibility.

Virtual DOM (document object model) enables the organization of documents in HTML, XHTML, or XML forms into a tree from which web browsers may parse various web app components more easily.

When used with ES6/7, ReactJS can handle heavy loads.

on a simple basis.

With this type of data flow, downward data binding means that the child item cannot impact parent data.

A JavaScript framework that is completely open-source and receives regular updates and enhancements thanks to the efforts of developers around the world

Lightweight due to the ease with which the user-side data processing can be simultaneously represented on the server side.

The majority of the migration procedure may be automated thanks to Facebook's "codewords," which make the process in general fairly simple.

Limitations of ReactJS

Lack of formal documentation — due to ReactJS's lightning-fast development, there is no room for the necessary documentation, which is now somewhat disorganized due to developers' ad hoc contributions.

React is agnostic, therefore developers occasionally have too many options.

React JS demands an extensive understanding of how to integrate user interfaces into the MVC framework because it takes a long time to grasp.

Facebook, Instagram, Netflix, New York Times, Yahoo, Khan Academy, Whatsapp, Codecademy, Dropbox, Airbnb, Asana, Atlassian, Intercom, and Microsoft are among the companies that employ ReactJS.

Angular 2's benefits and drawbacks

The 2009-founded, super-heroic Angular JavaScript MVVM framework is fantastic for creating incredibly interactive and incredibly interactive web applications.

Angular 2 advantages include:

Improved RXJS, a quicker compilation time (under 3 seconds), and a new HttpClient launch are some of the new improvements.

Developer developers can obtain all the information they need from thorough documentation without having to consult their colleagues. This calls for extra study time, though.

Two-way data binding allows for unique app behavior and reduces the possibility of errors.

Developers can work independently on the same app area utilizing the same set of data thanks to MVVM (Model-View-ViewModel).

dependency injection of features about modules and modularity in general about parts.

Limitations of Angular 2:

The intricate syntax results from the original Angular framework. However, TypeScript 2.4, which is used by Angular 5, is the easiest to learn of the bunch.

Migration issues may arise while switching from an earlier version to the most recent version.

Upwork, Freelancer, Udemy, YouTube, Paypal, Nike, Google, Telegram, Weather, iStockphoto, AWS, and Crunchbase are among businesses that employ Angular 5.

Read More:  Some tricks to learn to react to js quickly

[sagar-jaybhay]

Forms,Form-validation,FormControl & FromGroup

New Post has been published on https://is.gd/oDoCXw

Forms,Form-validation,FormControl & FromGroup

How to Build a Form,Validation,FormControl,FormGroup in Angular?

Now in our application, we want to create the contact form so we use below ng-cli command to generate all component related data once.

D:\Target Dec-2019\Angular_Application\hello-sagar-jaybhay>ng g c contact-form CREATE src/app/contact-form/contact-form.component.html (27 bytes) CREATE src/app/contact-form/contact-form.component.spec.ts (664 bytes) CREATE src/app/contact-form/contact-form.component.ts (292 bytes) CREATE src/app/contact-form/contact-form.component.css (0 bytes) UPDATE src/app/app.module.ts (1307 bytes)

These are files created by using cli command and added a reference to app.module.ts file.

Now first we build contact form with bootstrap CSS.

<p>contact-form works!</p> <div class="container-fluid" style="width: 50%"> <form> <div class="form-group"> <label for="firstName">First Name</label> <input id="firstName" type="text" class="form-control"> </div> <div class="form-group"> <label for="comment">Comment</label> <textarea id="comment" col=30 rows="10" type="textare" class="form-control"></textarea> </div> <div class="form-group"> <button class="btn btn-primary form-control" >Submit</button> </div> </form> </div>

FormControl

Now we need to add validation for our form elements, so in angular, we have FormControl class by using this we will check the value of field,also field is touched or not touched,is value is dirty or not, is value pristine means value is not changed. So for each input field in the form we need control object.

Tracks the value and validation status of an individual form control. In this FormControl class is inherited from AbstractControl class. This is one of the three fundamental building blocks of Angular forms, along with FormGroup and FormArray. It extends the AbstractControl class that implements most of the base functionality for accessing the value, validation status, user interactions, and events.

FormGroup

All the property of formcontrol class are available to FormGroup class means dirty,value,touched,untouched like properties are present in FormGroup.

A FormGroup aggregates the values of each child FormControl into one object, with each control name as the key. It calculates its status by reducing the status values of its children. For example, if one of the controls in a group is invalid, the entire group becomes invalid.

FormGroup is one of the three fundamental building blocks used to define forms in Angular, along with FormControl and FormArray.

When instantiating a FormGroup, pass in a collection of child controls as the first argument. The key for each child registers the name for the control.

It will send the value is valid or not if all the elements in form are valid else it will give not valid. So accessing properties of FormGroup are easier than accessing all the elements properties are present on that form.

Difference between Reactive Forms in Angular and Template-Driven forms in Angular?

Reactive Forms Template Driven Forms Here we have more control over validation logic. Simple Validation present It is also good for complex forms. It is good for simple forms. It is good for the Unit Test. It is easier to create   Less code is required

ngModel

In angular ngModel directive creates the FormControl instance and it will track value, user interaction and also validation status of that respective control. It will keep view sync with the model.

<input ngModel id="firstName" type="text" class="form-control">

It accepts a domain model as an optional Input. If you have a one-way binding to ngModel with [] syntax, changing the value of the domain model in the component class sets the value in the view. If you have a two-way binding with [()] syntax (also known as ‘banana-box syntax’), the value in the UI always syncs back to the domain model in your class.

Now remember ngModel requires name attribute. If you can’t specify the name attribute it will throw an error.

So to avoid this error we simply put name attribute like below.

<input ngModel name="firstName" id="firstName" type="text" class="form-control">

When we add ngModel with name directive on control then angular automatically create an instance of FormControl class and associate with that control.

Now we are going to add change event and for this, we add change event to this input field.

<input ngModel name="firstName" id="firstName" #firstName="ngModel" type="text" (change)="log(firstName)" class="form-control">

To inspect the properties of the associated FormControl (like validity state), export the directive into a local template variable using ngModel as the key (ex: #myVar="ngModel").

#firstName=”ngModel” this is called template variable.

Now you can see below image on change event we get NgModel object.

NgModel is an object and below are the properties of that object. And NgModel is the instance of FormControl class.

1. NgModel _parent: NgForm, name: "firstName", valueAccessor: DefaultValueAccessor, _rawValidators: Array(0), _rawAsyncValidators: Array(0), … 1. control: FormControl validator: null, asyncValidator: null, _onCollectionChange: ƒ, pristine: false, touched: true, … 2. model: "" 3. name: "firstName" 4. update: EventEmitter _isScalar: false, observers: Array(0), closed: false, isStopped: false, hasError: false, … 5. valueAccessor: DefaultValueAccessor _renderer: DebugRenderer2, _elementRef: ElementRef, _compositionMode: true, onChange: ƒ, onTouched: ƒ, … 6. viewModel: "sagar" 7. _parent: NgForm submitted: false, _directives: Array(1), ngSubmit: EventEmitter, form: FormGroup 8. _rawAsyncValidators: [] 9. _rawValidators: [] 10. _registered: true 11. asyncValidator: (...) 12. dirty: (...) 13. disabled: (...) 14. enabled: (...) 15. errors: (...) 16. formDirective: (...) 17. invalid: (...) 18. path: (...) 19. pending: (...) 20. pristine: (...) 21. status: (...) 22. statusChanges: (...) 23. touched: (...) 24. untouched: (...) 25. valid: (...) 26. validator: (...) 27. value: (...) 28. valueChanges: (...) 29. __proto__: NgControl

More info on this link-https://angular.io/api/forms/NgModel

Validation Of Input Element

Now if we want to add multiple validation on input field we are added like below.

<label for="firstName">First Name</label> <input minlength="3" required pattern="sagar" ngModel name="firstNames" id="firstName" #firstNames="ngModel" type="text" (change)="log(firstNames)" class="form-control"> <div *ngIf="firstNames.errors?.required">First Name Should required</div> <div *ngIf="firstNames.errors?.minlength">First Name minimum length 3 is required</div> <div *ngIf="firstNames.errors?.pattern">Pattern should match</div> <div class="alert alert-danger" *ngIf="firstNames.touched && !firstNames.valid">First Name is Not Valid</div>

And if validation not matched the output is like below image.

In this we apply html inbuilt validation on control and it is applicable in angular also. So by using errors object we can check the respective validation.

<div *ngIf="firstNames.errors?.required">First Name Should required</div>

So in the above tag in *ngIf we are using firstNames as a template variable and by using that template variable we use errors property of FormControl instance because it creates formcontrol instance why bcoz we use ngModel with name property. If the errors object is not null then it will check the required subfield of that errors object.

Now you want to red the inputbox border to do this we check the CSS and if that all CSS present on that formcontrol we apply style so

.form-control.ng-invalid.ng-touched border: 1px solid red;

This is the style by which we apply red border on input text box. The output of this like below.

Form tag in angular

When angular see <form> tag in Html then angular automatically add ngForm directive to that form.

Ngform have output property ngSubmit. In below html of contact form.

<form #f="ngForm" (ngSubmit)="Submit(f)"> <div class="form-group"> <label for="firstName">First Name</label> <input minlength="3" required pattern="sagar" ngModel name="firstNames" id="firstName" #firstNames="ngModel" type="text" (change)="log(firstNames)" class="form-control"> <div *ngIf="firstNames.errors?.required">First Name Should required</div> <div *ngIf="firstNames.errors?.minlength">First Name minimum length 3 is required</div> <div *ngIf="firstNames.errors?.pattern">Pattern should match</div> <div class="alert alert-danger" *ngIf="firstNames.touched && !firstNames.valid">First Name is Not Valid</div> </div> <div class="form-group"> <label for="comment">Comment</label> <textarea id="comment" ngModel name="comment" #comment="ngModel" col=30 rows="10" type="textare" class="form-control"></textarea> </div> <div class="form-group"> <button class="btn btn-primary form-control" >Submit</button> </div> </form> </div>

In a form tag, we create #f is a template variable and of that form tag we use ngSubmit event for generating the output. Now you can see if we submit that button present on the form the output on a console we get.

1. NgForm submitted: true, _directives: Array(2), ngSubmit: EventEmitter, form: FormGroup 1. form: FormGroup validator: null, asyncValidator: null, _onCollectionChange: ƒ, pristine: true, touched: false, … 2. ngSubmit: EventEmitter _isScalar: false, observers: Array(1), closed: false, isStopped: false, hasError: false, … 3. submitted: true 4. _directives: (2) [NgModel, NgModel] 5. control: FormGroup 6. controls: (...) 7. dirty: (...) 8. disabled: (...) 9. enabled: (...) 10. errors: (...) 11. formDirective: (...) 12. invalid: (...) 13. path: (...) 14. pending: (...) 15. pristine: (...) 16. status: (...) 17. statusChanges: (...) 18. touched: (...) 19. untouched: (...) 20. valid: (...) 21. value: (...) 22. valueChanges: (...) 23. __proto__: ControlContainer

This is the form object of FormGroup class and has some same properties as the FormControl instance object like ngModel.

In this form object value is JSON object by which we can get value from our form and it is a key-value representation of that form element. Also remember the name we assign is taken into consideration while getting the value.

NgModelGroup

This directive can only be used as a child of NgForm (within <form> tags).

Use this directive to validate a sub-group of your form separately from the rest of your form, or if some values in your domain model make more sense to consume together in a nested object.

Provide a name for the sub-group and it will become the key for the sub-group in the form’s full value. If you need direct access, export the directive into a local template variable using ngModelGroup (ex: #myGroup="ngModelGroup").

In angular, we have two classes to check state of input field and their validity.

FormControl

FormGroup

FormControl:- it will check only one input field like input text box, textarea like that. When we apply ngModel to input field angular create instance of FormControl and associate that with this input field.

FormGroup:- It is used to represent the entire form and also an option we have to make a group within a form. ngForm directive automatically apply to all form element. So this will automatically create formgroup object and associate that with that form. By using this formgroup object we can check the state changes of that form and its validity.

What is the difference between ngModelGroup and ngForm?

In this ngForm have output property ngSubmit by using this we able to submit the form and this property is not present in the ngModelGroup. So ngModelGroup not able to submit the value as a part of a form.

How to disable button till form is completely filled or valid?

<button class="btn btn-primary form-control" [disabled]="!f.valid">Submit</button>

In the above code, we use disabled attribute and in this we check form is valid or not. F is template variable of respective form and it is used to check the validation of all control at once.

ngValue is used to select a complete object.

<option *ngFor="let m of contactMethods" [value]="m.id" [ngValue]="m">m.name</option>