Developer Guides
In-depth guides covering the principles and practical usage of common developer tools and technologies
SEO Meta Tags Complete Guide — OG, Twitter Card & Structured Data
Covers title, description, canonical, Open Graph, Twitter Card, JSON-LD structured data, and a practical SEO checklist.
HTTP Headers Complete Guide — Security and Cache Strategy
Covers HTTP response headers, CSP, CORS, HSTS, Cache-Control, and Nginx/Apache/Cloudflare implementation.
Anatomy of a JWT — Reading Header, Payload and Signature
The three-part token structure, standard claims, signature algorithms, and a practical debugging checklist.
Fixing CORS Errors — Preflight and Response Headers Explained
What actually causes CORS errors, when preflights fire, and the server header set that fixes them.
HTML Validation Guide — Tag Errors, Accessibility, and Unused CSS
Practical checks for unclosed tags, duplicate IDs, required attributes, document basics, and unused CSS cleanup.
CSS Minification: Principles and Build Pipeline Integration
Covers CSS compression internals, tool comparisons, Vite/Webpack integration, and Lighthouse performance impact.
Everything About Base64 Encoding: From Image Embedding to JWT
Covers Base64 principles, Standard vs URL-safe variants, JWT, Data URIs, HTTP Basic Authentication, and API payloads.
URL Encoding Rules and Pitfalls Every Developer Should Know
Covers percent encoding, encodeURI vs encodeURIComponent, double encoding, space handling, and multilingual URLs.
Complete Guide to JSON Data Handling
Covers JSON syntax, data types, parsing errors, REST API response patterns, and JSON Schema validation.
Character Counting Guide — Unicode, Emoji & Multibyte Processing
Explains character counting pitfalls, UTF-8 byte sizes, emoji surrogate pairs, and platform-specific limits.
Diff Algorithms Complete Guide — LCS, Myers, and Git diff
Explains LCS and Myers diff, Git diff output, and practical use in code review and deployment checks.
HEX, RGB & HSL Color Systems — WCAG Accessibility and Dark Mode
Explains color models, WCAG contrast, dark mode strategies, and modern CSS color functions.
UUID v1 vs v4 vs v7: Which Should You Choose?
Compares UUID generation principles, privacy implications, B-tree index performance, ULID, and selection criteria.
Complete Unix Timestamp Guide — From 2038 to Timezones
Covers Unix timestamp principles, milliseconds vs seconds confusion, the Y2K38 problem, and timezone conversion.
File Integrity Verification Guide: SHA-256 and MD5 Hash Principles
Explains hash functions, algorithm comparison, software distribution verification, backup integrity, and SRI.