Description

Introduction of RESTful API Integration in Angular

Seamless API integration is a crucial part of modern web applications, allowing efficient communication between the frontend and backend. This training covers RESTful API integration in Angular, focusing on HTTPClient for making API requests, interceptors for request modification, and robust error handling mechanisms. Participants will learn how to efficiently fetch, manipulate, and manage data while improving performance and security.

Prerequisites

• Basic understanding of Angular and TypeScript
• Familiarity with JavaScript ES6+ concepts
• Knowledge of RESTful APIs and HTTP methods
• Basic experience with Angular CLI

Table of Contents

1. Introduction to RESTful APIs in Angular

1.1 What is a RESTful API?
1.2 Understanding HTTP Methods (GET, POST, PUT, DELETE, PATCH)
1.3 How Angular Interacts with APIs

2. Setting Up HTTPClient in Angular

2.1 Introduction to Angular HTTPClient Module
2.2 Configuring HttpClientModule in an Angular Project(Ref: Angular Testing Mastery: Fundamentals to Advanced Techniques)
2.3 Making a Simple GET Request
2.4 Handling API Responses and Data Transformation

3. Performing CRUD Operations with HTTPClient

3.1 Sending Data with POST Requests
3.2 Updating Resources with PUT and PATCH Requests
3.3 Deleting Data with DELETE Requests
3.4 Hands-On: Implementing CRUD Operations in an Angular App

4. Working with Query Parameters and Headers

4.1 Sending Query Parameters in API Requests
4.2 Modifying Request Headers for Authentication and Content Type
4.3 Using HttpParams for Dynamic Parameters
4.4 Hands-On: Implementing API Calls with Custom Headers

5. Managing API Calls with RxJS Operators

5.1 Introduction to RxJS in HTTP Requests
5.2 Using map(), filter(), and switchMap() for Data Transformation
5.3 Handling API Responses with tap() and catchError()
5.4 Hands-On: Optimizing API Calls with RxJS

6. Implementing HTTP Interceptors in Angular

6.1 What are HTTP Interceptors?
6.2 Creating and Registering an HTTP Interceptor
6.3 Adding Authentication Tokens to Requests
6.4 Logging and Monitoring API Calls with Interceptors
6.5 Hands-On: Implementing a JWT Authorization Interceptor

7. Error Handling and Retry Strategies

7.1 Handling API Errors Gracefully (HttpErrorResponse)
7.2 Using catchError() and throwError() in API Calls
7.3 Implementing Retry Mechanisms with retry() and retryWhen()
7.4 Showing User-Friendly Error Messages
7.5 Hands-On: Implementing Global Error Handling for API Calls

8. Optimizing API Calls for Performance

8.1 Caching API Responses with shareReplay()
8.2 Using Debounce and Throttling to Optimize Network Requests
8.3 Implementing Pagination and Infinite Scrolling
8.4 Hands-On: Optimizing an Angular Application with API Caching

9. Securing API Requests in Angular

9.1 Implementing Token-Based Authentication (JWT)
9.2 Preventing Cross-Site Request Forgery (CSRF) Attacks
9.3 Using Angular Guards for API Security
9.4 Hands-On: Securing API Requests with Authentication Headers

10. Debugging and Testing API Calls

10.1 Debugging API Calls with Browser Developer Tools
10.2 Using Postman for API Testing and Validation
10.3 Writing Unit Tests for API Calls with Jasmine and Karma
10.4 Hands-On: Writing and Running Tests for API Integration

Conclusion

By the end of this training, participants will be equipped with the skills to integrate RESTful APIs seamlessly into Angular applications. They will learn best practices for API interaction, including efficient data fetching, robust error handling, request interception, and security enhancements. This will empower them to build scalable and high-performing Angular applications.

Reference