Changing my implementation of an EXTREMELY deeply nested Angular Reactive Form

Do you have a deeply nested data structure? Do you have to build a form around it? Is this form really slow to work with? Are your users complaining about it? Do you need an escape? WAIT! I’m here to guide you home.

TL,DR:

  1. Analyze a reactive form to identify the scopes for refactoring.
  2. Modularize the code by refactoring for better separation of concerns.
  3. Refactor the way the Reactive Form is generated in TypeScript.
  4. Identifying the source of performance lag.
  5. Enhance the performance by refactoring the form template.
  6. Starting Point — StackBlitz Project
  7. End Goal — StackBlitz Project

The inspiration to write this article came from a Stack Overflow question, the title of which read:

“Angular 7, Reactive Form slow response when has large data”

I did answer the question there. But then I thought why not write a detailed medium article about it. So here I am, doing just that.

#angular #javascript #web-development #nest

What is GEEK

Buddha Community

Changing my implementation of an EXTREMELY deeply nested Angular Reactive Form

Changing my implementation of an EXTREMELY deeply nested Angular Reactive Form

Do you have a deeply nested data structure? Do you have to build a form around it? Is this form really slow to work with? Are your users complaining about it? Do you need an escape? WAIT! I’m here to guide you home.

TL,DR:

  1. Analyze a reactive form to identify the scopes for refactoring.
  2. Modularize the code by refactoring for better separation of concerns.
  3. Refactor the way the Reactive Form is generated in TypeScript.
  4. Identifying the source of performance lag.
  5. Enhance the performance by refactoring the form template.
  6. Starting Point — StackBlitz Project
  7. End Goal — StackBlitz Project

The inspiration to write this article came from a Stack Overflow question, the title of which read:

“Angular 7, Reactive Form slow response when has large data”

I did answer the question there. But then I thought why not write a detailed medium article about it. So here I am, doing just that.

#angular #javascript #web-development #nest

I am Developer

1608866530

Angular 11 Reactive Forms Validation Tutorial

Reactive form validation in Angular 11 app. In this tutorial, i will show you how to use reactive form validation in angular 11 app.

As well as, and you will learn how use reactive form validation in angular 11. And also use reactive form with formGroup for validation in angular 11 app.

Reactive Form Validation In Angular 11
Step 1 – Create New Angular App
Step 2 – Import Form Module
Step 3 – Add Code on View File
Step 4 – Use Component ts File
Step 5 – Start Angular App

https://www.tutsmake.com/angular-11-reactive-forms-validation-tutorial-example/

#reactive form validation in angular 11 #angular 11/10/9/8/7 reactive forms validation example #angular 11 form validation example

Alfredo  Yost

Alfredo Yost

1591183409

Angular: Nested Reactive Forms Using ControlValueAccessors(CVAs)

In this post, we will see how to implement nested reactive forms using composite control value accessors(CVAs). Kara Erickson of the Angular Core Team presented this approach at the Angular Connect 2017 .

#angular #angular-forms #javascript #nest

Christa  Stehr

Christa Stehr

1598940617

Install Angular - Angular Environment Setup Process

Angular is a TypeScript based framework that works in synchronization with HTML, CSS, and JavaScript. To work with angular, domain knowledge of these 3 is required.

  1. Installing Node.js and npm
  2. Installing Angular CLI
  3. Creating workspace
  4. Deploying your First App

In this article, you will get to know about the Angular Environment setup process. After reading this article, you will be able to install, setup, create, and launch your own application in Angular. So let’s start!!!

Angular environment setup

Install Angular in Easy Steps

For Installing Angular on your Machine, there are 2 prerequisites:

  • Node.js
  • npm Package Manager
Node.js

First you need to have Node.js installed as Angular require current, active LTS or maintenance LTS version of Node.js

Download and Install Node.js version suitable for your machine’s operating system.

Npm Package Manager

Angular, Angular CLI and Angular applications are dependent on npm packages. By installing Node.js, you have automatically installed the npm Package manager which will be the base for installing angular in your system. To check the presence of npm client and Angular version check of npm client, run this command:

  1. npm -v

Installing Angular CLI

  • Open Terminal/Command Prompt
  • To install Angular CLI, run the below command:
  1. npm install -g @angular/cli

installing angular CLI

· After executing the command, Angular CLI will get installed within some time. You can check it using the following command

  1. ng --version

Workspace Creation

Now as your Angular CLI is installed, you need to create a workspace to work upon your application. Methods for it are:

  • Using CLI
  • Using Visual Studio Code
1. Using CLI

To create a workspace:

  • Navigate to the desired directory where you want to create your workspace using cd command in the Terminal/Command prompt
  • Then in the directory write this command on your terminal and provide the name of the app which you want to create. In my case I have mentioned DataFlair:
  1. Ng new YourAppName

create angular workspace

  • After running this command, it will prompt you to select from various options about the CSS and other functionalities.

angular CSS options

  • To leave everything to default, simply press the Enter or the Return key.

angular setup

#angular tutorials #angular cli install #angular environment setup #angular version check #download angular #install angular #install angular cli

Clara  Gutmann

Clara Gutmann

1598705160

Angular 8 Forms | Angular Reactive and Template Forms

Angular Forms are used to handle the user’s input. We can use Angular form in our application to enable users to log in, update profiles, enter information, and to perform many other data-entry tasks.

If you are new to Angular, then check out myAngular Tutorial. If you do not know how to upgrade to Angular 8 via Angular CLI, then check out my Angular Upgrade tutorial. Managing user input with forms is the cornerstone of many web applications.

The web app uses forms to enable the users to log in, to update a profile, to enter sensitive information, and to perform many data-entry tasks.

#angular #angular 8 #angular reactive