Published in Angular Training·May 17How to write async form validators with Angular?Sometimes, we need server-side information to valid form data in the browser. Angular’s AsyncValidators are the way to achieve such asynchronous validation with Angular. If you’re familiar with custom form validation in Angular, you’re aware that custom validators are functions that take an AbstractControl as a parameter and return null…Reactive Form Validation3 min read
Published in Angular Training·Apr 225 tips on using Angular FormControlWe often learn Angular presented with two options for working with forms: Template driven or reactive (or both!) In several cases, small forms (for instance, a login screen, a single text input, or a single dropdown) don’t need that kind of verbosity. In this post, we will look at…Angular4 min read
Published in Angular Training·Apr 125 string-related features of Modern JavaScriptSince 2015, Javascript has been changing faster than ever and is now evolving every year. As a result, many APIs improve over time, as is the case for string manipulation. In this blog post, we’re going to cover five useful functions added since ES6 Javascript, which is also known as…Java Script3 min read
Published in Angular Training·Mar 18RxJs Observables in 5 minutesRxJs is a reasonably tricky library to get started with. That’s because it comes with different concepts and vocabulary that can seem intimidating: Streams, Observables, Operators, Subjects, etc. This article will demystify what RxJs is all about in just a few minutes of your time. What is RxJs? RxJs is a library that…Rxjs4 min read
Published in Angular Training·Jan 7How to use a skeleton loader with Angular?Skeleton loaders have become quite popular over the past few years. The purpose of such loaders is to show a placeholder where content is loading. Usually, skeleton loaders display a greyed template reflecting the structure and look of the entire view. It gives an idea of what kind of content…Angular3 min read
Published in Angular Training·Dec 21, 2021How to authenticate/authorize a user with Angular?If you ever have to implement user authentication (log in or sign in) or user authorization (is the current user allowed to see that screen?), this article is for you! We’ll take a look at how to use Angular Guards as a way to: Check if the current user is…Angular4 min read
Published in Angular Training·Nov 16, 2021What’s new in Angular 13?Angular 13 is now available! This year it’s the second major version of the framework, as Angular gets one major release roughly every six months. Let’s dive into it and see what’s new in this latest version. Super-fast “ng serve” ViewEngine was entirely removed from the framework in v13. This means that Angular…Angular3 min read
Published in Angular Training·Oct 14, 20213 reasons to use the tap operator from RxJsThe tap operator is one of my favorite and most used features of RxJs. So today, I’m going to highlight three different and handy use cases of the tap operator. Debugging by logging what is going on in a data stream This is one of the easiest ways to visualize what is happening within a pipe of observable streams. …Rxjs3 min read
Published in Angular Training·Sep 27, 2021How to implement a dark theme with CSS and Angular?Dark themes have gained a lot of popularity over the past few years, and these days every primary website has a dark theme option. While there are many different options to implement a dark theme with CSS, this post will focus on one of the most straightforward implementations, using modern…CSS3 min read
Published in Angular Training·Aug 31, 2021How to use dependency injection with strings and numbers in Angular?You’re probably familiar with dependency injection using classes, but what about using strings, numbers, booleans, or any other object? “Classic” dependency injection with classes/services The nominal case of dependency injection in Angular uses injectable classes that are often called services. Such implementation relies on having an injectable class defined like this: import { Injectable }…Angular2 min read
