Web Development Fundamentals

Learn when to use cookies, localStorage, and sessionStorage by comparing their scope, lifetime, request behavior, and security risks.

A practical, beginner-friendly walkthrough of what happens between entering a URL and seeing a usable page, including DNS, HTTP, servers, browser rendering, and a reliable debugging sequence.

A CDN is a delivery and caching layer between visitors and your origin server. Learn how edge caches, freshness, invalidation, and privacy affect real websites.

Audit a technical page from its HTML source to crawling, indexing, links, JavaScript rendering, images, accessibility, and performance without chasing ranking myths.

Learn to debug APIs by layers: request construction, network, HTTP status, JSON shape, CORS, authentication, pagination, and rate limits.

Version control is more than an undo button. Follow a real change from branch and pull request to merge, smoke test, and rollback while learning how Git keeps a trustworthy trail.

A domain, DNS, hosting, and HTTP do different jobs. Trace a URL from the name a visitor types to the response a browser receives, and debug each layer with evidence.

Browser compatibility problems become easier to solve when you separate engine behavior, feature support, network state, permissions, and application assumptions.

Learn how HTTP requests and responses work, what HTTPS adds, common status codes, and how it all connects frontend and backend.

Following every responsive design rule and still seeing a broken mobile site? The real causes are the viewport lie, fixed-width reflow, and DOM reading order.

Frontend and backend are cooperating responsibilities in one product. Follow a booking feature from interface to API, business rules, data, authentication, and the user-visible result.

Learn CSS syntax, how to link a stylesheet to HTML, and the core properties every beginner needs to start styling a real web page.