English | MP4 | AVC 1280×720 | AAC 44KHz 2ch | 5.5 Hours | 2.90 GB
eLearning | Skill level: All Levels
Build Angular Applications in Reactive style with plain RxJs – Patterns, Anti-Patterns, Lightweight State Management
This course is a catalog of commonly used design patterns (and some anti-patterns) that every Angular developer should know. The goal of the course is to teach you how to comfortably design and develop applications in Angular in Reactive style using just plain RxJs, and nothing more.
This course comes with a running Github repository with the the finished code, as well as starting points for different sections of the course in case that you want to code along, which we recommend as its the best way to learn.
This course answers the common question: how far can we go in Angular while using only plain RxJs and nothing more, without introducing any state management library?
It turns out that the simple set of techniques taught in this course are very well suited for a wide range of applications, especially in-house built enterprise applications.
In this course, you will learn exactly how to use RxJs to design and develop both the service and the view layers of your application, and you will understand both the advantages and the pitfalls of the reactive approach.
Particularly when it comes to state management, it turns out that we can already go very far by leveraging only plain Angular and RxJs techniques, without using an additional state management library like for example NgRx.
These simplified state management techniques are adequate and sufficient for a large range of applications, and we believe that you should consider them first before thinking of adopting a full-blown state management solution.
How far can you go with these techniques? That’s what you will find out in this course.
We are going to start our course by taking a small Angular application that is written in imperative style, and we are going to talk about some of the problems of that approach. Then, we are going to refactor the application and explain step-by-step how to implement it in reactive style instead.
We will explain in detail every RxJs operator that we come across in this course, the first time that we need each operator.
We are going to start with a fully stateless solution first, but later we are going to improve the user experience by applying some simple RxJs-only state management techniques. We are going to use these patterns in order to handle some of the data of the application, as well as the user authentication profile.
The key element needed to implement lightweight state management is RxJs behavior subjects so we will cover those in detail in the course. We will also provide step-by-step reactive style solutions for common UI functionality like loading indicators or error messages.
This course covers the following topics:
- Review of an application written in imperative style
- Refactoring into stateless reactive style, understanding the benefits
- Smart vs Presentational Components
- Stateless Observable Services
- The shareReplay Operator
- Stateless UI updates (without state management)
- Introduction to RxJs Subjects and BehaviorSubject
- Decoupled component communication using shared observable services
- Using Observables to have components interact at different levels of the component tree
- Error Handling and error messages in reactive style
- Loading Indicators in reactive style
- Improving user experience with lightweight RxJs stores
- Optimistic UI updates
- Managing User Authentication state with plain RxJs
- Local vs Global Services
- Master Detail with cached master table in reactive style
- The Single Data Observable Pattern: Avoiding nested ng-component tags
- Refactoring a reactive application to OnPush change detection
- Conclusion and key takeaways
What Will You Learn In this Course?
At the end of the course, you will feel comfortable designing and developing Angular applications in reactive style, by leveraging plain RxJs-only techniques. You will know how to apply simplified reactive state management techniques to different common use cases, and you will understand the advantages and the limitations of this approach.
You will be familiar with a series of commonly needed reactive design patterns, and you will also be familiar with a series of common pitfalls to avoid.
What you’ll learn
Code in Github repository with downloadable ZIP files per section
Learn Lightweight State Management techniques (RxJs only)
Understand the Core Principles of Reactive Programming in general
Know how to build Applications in Angular in Reactive Style using RxJs
Learn a Catalog of RxJs Application Design Patterns and Anti-Patterns
1 Reactive Angular Course – Helicopter View
2 Recommended Software Versions
3 Setting Up your Development Environment
Stateless Observables Services
4 Reviewing a component written in traditional Imperative Style
5 Understanding potential problems of a program written in Imperative style
6 Design Pattern – Stateless Observable-based Services
7 Consuming Observable-based services using the Angular async Pipe
8 Avoiding Angular duplicate HTTP requests with the RxJs shareReplay operator
9 Angular view Layer Patterns – Smart vs Presentational Components
10 Data Modification Example in Reactive Style (Stateless Application)
Reactive Component Interaction
11 Reactive Component Interaction – Section Introduction
12 Decoupled component communication using a shared Service
13 Loading Service Reactive API Design
14 Reactive Component Interaction using Custom Observables and Behavior Subject
15 Loading Indication Service – Reactive Implementation Finished
16 Understanding the Angular Component providers property
17 Error Handling and the Messages Component
18 Error Handling with the catchError RxJs operator
19 Messages Service – Implementation Finished and Demo
20 Local Error Handling in an Angular Material Dialog
21 Angular State Management – When is it Needed and Why
22 Initial Implementation of a Store Service
23 Step-by-Step Implementation of an Angular Store Service
24 Store Optimistic Data Modification Operations – API Design
25 Store Optimistic Data Modifications – Step-By-Step Implementation
Authentication State Management
26 Authentication State Management – Section Introduction
27 Authentication Store – Step-By-Step Implementation
28 Adapting the UI according to the user Authentication status
29 Authentication Store – Browser Refresh support with Local Storage
Master-Detail UI Pattern (with built-in State Management)
30 Master-Detail UI Pattern – Section Introduction
31 Angular Master Detail Implementation – The Master Table
32 Angular Master Detail Implementation – The Detail Element
33 Angular Master Detail Implementation – Final Demo
The Single Data Observable Pattern
34 Consolidation Exercise – Implementing the Course Screen in Reactive Style
35 Course Component Finished – Introduction to the Single Data Observable Pattern
36 Reactive Angular – The Single Data Observable Pattern
37 Single Data Observable Pattern – Default Data Values
38 Refactoring an Angular Reactive Application to OnPush Change Detection
Conclusions and Course Summary
39 Other Courses
40 Bonus Lecture Learn More About The Angular University And My YouTube Channel
41 Conclusion Key Takeaways