UrVisRetained-mode 2D scene graph

A framework-agnostic rendering engine that paints one scene graph through four interchangeable backends — SVG, Canvas, WebGL, and WebGPU.

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Retained scene graph

Build a tree of shapes once. Mutate nodes; the engine coalesces dirty marks into a single scheduled frame and re-paints only what changed.

Four renderers

SVG · Canvas · WebGL · WebGPU. One Renderer contract, swappable at mount time. Pick the backend that fits — the scene stays identical.

Own tween + spring animation

A WAAPI-shaped node.animate() with keyframes, easings, numeric springs, and named presets (snap, smooth, bouncy, gentle, flash). No external animation lib.

Server-side SVG + PNG

@urvis/node renders a scene to a pure SVG string, or to PNG/JPEG/WebP buffers via an optional @napi-rs/canvas peer — ideal for SSR, email, and blob previews.

Framework-agnostic

No React, no Vue, no D3, no chart concepts. Plain TypeScript classes and functions. Drop it into anything.

Tiny & tree-shakeable

Strict ESM. Import only the shapes, backends, and helpers you use. A static scene parks the animation loop and pays zero idle cost.