Web Development Beginner

What is CSS Flexbox?

A CSS layout model that provides efficient arrangement of items within a container, handling alignment, distribution, and spacing.

Flexbox simplifies one-dimensional layouts (row or column). Key container properties: display: flex, flex-direction, justify-content (main axis alignment), align-items (cross axis), gap, and flex-wrap. Item properties: flex-grow, flex-shrink, flex-basis, and order.

Common patterns include centering (justify-content: center; align-items: center), equal spacing (justify-content: space-between), responsive navigation bars, and card layouts. Flexbox replaced many float and positioning hacks with clean, predictable layout behavior.

Learn More About This Topic

HTML & CSS Fundamentals

Related reading

JavaScript ES6+ Modern Features

Related reading

JavaScript Fundamentals

Related reading

Related Terms

The latest HTTP version that uses QUIC instead of TCP, providing faster connections and better performance on unreliable networks.

HTTP headers that control cross-origin resource sharing between different domains, specifying allowed origins, methods, and headers.

Server-Sent Events (SSE)

A web technology enabling servers to push real-time updates to browsers over a single HTTP connection, simpler than WebSockets.

Content Negotiation

An HTTP mechanism where client and server agree on the best representation of a resource based on format, language, or encoding preferences.

An HTML element that tells search engines which URL is the preferred version of a page when duplicate or similar content exists at multiple URLs.

A query language for APIs that lets clients request exactly the data they need, reducing over-fetching and under-fetching.

View All Web Development Terms →