Category: HTTP and API Integration

In modern web applications, integrating APIs efficiently is one of the most critical tasks. Angular provides a powerful ecosystem with HttpClient, RxJS, interceptors, and dependency injection, allowing developers to build clean and maintainable API communication layers. However, improper API handling can lead to problems such as duplicated code, unhandled errors, and memory leaks. Following structured…

Angular is a framework that strongly embraces the concept of dependency injection (DI) and services. Services in Angular are used to share logic, data, and state across multiple parts of an application. One of the most fundamental concepts when working with Angular services is understanding singleton services and provider scopes. This post explores these concepts…

Introduction When building web applications, HTTP requests often require additional data to be sent along with them. This can include headers (for authentication, content type, etc.) and query parameters (for pagination, searching, filtering, or sorting). Angular’s HttpClient provides powerful options to attach both headers and parameters dynamically. These make your API interactions more flexible, secure,…

This comprehensive post explains how to use HTTP interceptors in Angular. It includes only text, headings, and code — no icons or images. The post covers setup, configuration, real-world use cases, error handling, authentication, logging, request modification, chaining interceptors, testing, and best practices. Table of Contents 1. Introduction to HTTP Interceptors HTTP interceptors in Angular…

Error handling is one of the most critical aspects of building reliable, user-friendly web applications. In Angular, the HttpClient service enables us to communicate with backend APIs using observables. However, since network requests can fail for many reasons—such as invalid URLs, authentication errors, or server downtime—handling these errors properly is essential to ensure a smooth…

Angular applications rely heavily on reactive programming patterns powered by RxJS Observables. When working with APIs through Angular’s HttpClient, every HTTP request returns an Observable. Understanding how to handle Observables and subscriptions is crucial to building efficient, reactive, and memory-safe applications. This article provides a detailed guide to handling Observables and Subscriptions in Angular’s HTTP…

Introduction In modern web development, communicating with backend APIs is essential. Angular provides a powerful and easy-to-use HttpClient service that allows developers to perform all types of HTTP operations — including GET, POST, PUT, and DELETE. While GET requests are used to retrieve data, the other three methods — POST, PUT, and DELETE — are…

This post explains how to perform GET requests in Angular using HttpClient. It includes clear headings and code examples only — no icons or extra visuals. The content covers basic usage, typing responses, query parameters, headers, error handling, RxJS operators, cancellation, caching, testing, performance considerations, security, and best practices. Table of contents 1. Introduction GET…

When building modern web applications, data communication between the client and the server is essential. Angular provides a built-in module called HttpClientModule that simplifies HTTP communication with APIs. Whether you are fetching data, posting form information, or interacting with a RESTful backend, the HttpClient service allows you to make requests easily and handle responses efficiently.…

When building modern web applications, communication between the client and the server is essential. In Angular, the HttpClient service provides a powerful and easy-to-use API for interacting with RESTful web services. Whether you need to fetch data, send form submissions, update records, or delete resources, Angular’s HTTP module allows you to handle these operations efficiently…