Basic form validation with Angular – provide visual feedback with form changes CSS classes

Validating user input in HTML forms can be a tedious task. In this new series, we’ll look at how Angular can help us implement painless form validation. First, it’s essential to know that Angular relies primarily on native browser validation features that use modern HTML properties. For instance, if a form field has to be filled out, you can mark it as required using the required HTML attribute

Source: Basic form validation with Angular | Angular Newsletter

How to do polling with RxJs and Angular? | by Alain Chautard | Angular Training

In this tutorial, we’re going to implement a polling mechanism using RxJs and Angular. Our goal is to retrieve and render information that gets refreshed periodically. Our example is going to be a currency service that displays up-to-date currency exchange rates

Source: How to do polling with RxJs and Angular? | by Alain Chautard | Angular Training

Async pipe syntax tricks

What if I need to read multiple properties from the object in that subscription?

Another way to put it is that you don’t want to end up doing something like this:

<p>First name: {{ (user$ | async)?.firstName }}</p>
<p>Last name: {{ (user$ | async)?.lastName }}</p>Code language: HTML, XML (xml)

The above code is pretty hard to read and requires one subscription for each property. This alone can be a disaster, as each subscription might trigger an HTTP request for the same data from the server!

Instead, you can do something like this, which uses only one subscription, stores the result in a local variable, then renders the data when it’s available. This technique works with any structural directive, such as *ngIf or *ngFor:

<div *ngIf="user$ | async as user">
   <p>First name: {{ user.firstName }}</p>
   <p>Last name: {{ user.lastName }}</p>
</div>

Source: Async pipe syntax tricks | Angular Newsletter

Host and deploy Angular web app using Azure and Github

I am using Angular v17 and node v18.
In simple steps;
Goto azure portal.
Create a new resource of type “Static Web App”
I choose Github as Deployment source.

Regarding Angular v17, I had problems with the github deployment build actions:

  • Node was configured as v16 but angular v17 needs node v18
  • path to index.html for dist build could not be found

After Azure has created the static web app for Github deployment the following file is pushed into the repo:

.github/workflow/azure-static-web-apps-[*].yml

I hade to set the following values correctly:

app_location: "./" # App source code path
output_location: "./dist/gps-tracker/browser" # Built app content directory - optional

The output location should point to where the index.html file is located.
You should change the ‘gps-tracker’ to your application name. To find out exactly run ‘ng build’ locally and look into the created dist folder.

Regarding setting node version to 18: I added the following in the yml file:

env:
  NODE_VERSION: '18.x'

Print screen of node version setting:

Four ways of listening to DOM events in Angular (Part 2: @HostListener)

So now how about listening to events on the host element that wraps the component’s template? How can we do that properly in Angular apps? That’s the very question we will answer in this article. Before diving directly into listening to DOM events on a host element, I think we need to touch on what a host element is. The concept of host element applies not only to components but also attribute directives.

Source: Four ways of listening to DOM events in Angular (Part 2: @HostListener)

Top 5 Tips for Angular Development With WebStorm | JetBrains

No matter how much familiarity you have with Angular, or how you feel about it, JetBrains IDEs can make your experience with this framework much better. In today’s FOMO digest, we’ll tell you about the features for working in Angular that you can find in JetBrains IDEs, such as WebStorm, IntelliJ IDEA Ultimate, PhpStorm, Rider, PyCharm Professional, GoLand, and RubyMine.

Source: FOMO Digest #2: Top 5 Tips for Angular Development With JetBrains IDEs | The WebStorm Blog

NgRx – global state management for Angular applications – Getting started

Store is RxJS powered global state management for Angular applications, inspired by Redux. Store is a controlled state container designed to help write performant, consistent applications on top of Angular.

Key concepts
Actions describe unique events that are dispatched from components and services. State changes are handled by pure functions called reducers that take the current state and the latest action to compute a new state. Selectors are pure functions used to select, derive and compose pieces of state. State is accessed with the Store, an observable of state and an observer of actions.

Local state management
NgRx Store is mainly for managing global state across an entire application. In cases where you need to manage temporary or local component state, consider using NgRx ComponentStore.

Source: NgRx – @ngrx/store