ADevGuide Series: API and Backend Basics Series
All the articles in the "API and Backend Basics Series" series.
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REST API Error Handling Best Practices: Beginner Guide
Series: API and Backend Basics Series
Master REST API error handling with best practices for status codes, consistent payloads, retries, observability, and secure production APIs.
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What Is CORS? Complete Beginner Explanation
Series: API and Backend Basics Series
Learn what CORS is, why browsers block cross-origin requests, how preflight works, and which headers fix CORS errors safely.
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How JWT Works: Step-by-Step Guide for Beginners
Series: API and Backend Basics Series
Learn how JWT works step by step with header, payload, signature, expiry, validation, and real API authentication flows.
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Cookies vs Local Storage vs Session Storage Explained
Series: API and Backend Basics Series
Learn cookies vs local storage vs session storage with security, expiry, size limits, and real frontend/backend examples.
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JWT vs Session Authentication: Complete Comparison
Series: API and Backend Basics Series
Learn JWT vs session authentication with security, scalability, revocation, cookies, refresh tokens, and real API use cases.
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Authentication vs Authorization: What's the Difference?
Series: API and Backend Basics Series
Learn authentication vs authorization with clear API examples, 401 vs 403, sessions, JWTs, and role checks in modern backends.
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What Is JSON? Why It's Used in APIs
Series: API and Backend Basics Series
Learn what JSON is, how its syntax works, and why APIs use it for fast, language-independent data exchange.
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HTTP Status Codes Explained (200, 404, 500 and More)
Series: API and Backend Basics Series
Learn HTTP status codes with real API examples of 200, 201, 301, 304, 400, 401, 403, 404, 429, 500, and 503.
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HTTP Methods Explained: GET vs POST vs PUT vs DELETE
Series: API and Backend Basics Series
Learn HTTP methods with real examples of GET, POST, PUT, PATCH, and DELETE, plus safety, idempotency, caching, and API design rules.
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What Is REST API? Beginner's Guide with Examples
Series: API and Backend Basics Series
Understand what a REST API is, how resources, methods, status codes, and stateless requests work, with practical backend examples.