CSS Snapshot
CSS drives all visual layout. Key modules: Grid, Flexbox, Custom Properties, Cascade layers, Container Queries. The snapshot identifies what's stable vs experimental.
What It Defines
W3C CSS snapshot collects stable CSS modules: Cascade, Selectors, Box Model, Flexbox, Grid, Custom Properties, Color, Transitions, Animations, and more.
Canonical (Normative)
Convenient (Practical)
Publishes web platform specs including CSS, accessibility, security policies, Service Workers, Web App Manifest, and many browser APIs. Also maintains some versioned HTML/DOM specs.
Related Specs
The spec behind every HTML page, form, and browser API. The canonical reference for how browsers actually parse and process HTML.
Every frontend framework (React, Vue, Svelte) ultimately produces DOM operations. Understanding the event model and tree structure prevents subtle bugs.
The bridge between CSS animations and JavaScript control. Required for complex choreography, scroll-driven animations, and animation libraries (GSAP, Motion One) that target this API.