Category: Web Development

what is dns? A developer guide to the domain name system: how resolution works, record types like A, CNAME, MX and TXT, TTL, caching, and common pitfalls.

what is a cdn? Learn how a content delivery network caches assets on edge servers worldwide to cut latency, offload origins, and improve reliability.

what is a websocket? A clear developer guide to the full-duplex protocol powering chat, live dashboards, and real-time apps over one TCP connection.

What is local storage? A browser API that stores string key-value data on the device with no expiry, scoped per origin. Learn usage, limits, and security.

What is a cookie? A piece of data a server stores in the browser and sends back on each request. Learn attributes, security flags, and best practices.

What is a data URI? Learn how the data: scheme inlines files as base64 or text, its syntax, when to use it, and the caching, size, and security pitfalls.

What are HTTP status codes? A developer reference to the 1xx-5xx classes, common codes like 200, 301, 404, and 500, and how to choose the right one.

How px, em and rem actually differ: px is fixed, em compounds from the parent font-size, and rem stays anchored to the root. When to use each.

The RFC 3986 character sets that decide what to percent-encode: unreserved, gen-delims, sub-delims, and how the rules differ per URL component.

Why OKLCH describes colour by lightness, chroma and hue in a perceptually uniform space, and how that makes readable palettes and predictable tints.