CSS-Doodle is a web component that generates CSS-based grid patterns using Shadow DOM v1 and Custom Elements v1. The library allows developers to create complex generative art and animations entirely with CSS, supporting all major browsers without polyfills. Users can define grids from 1x1 up to 64x64 cells, with each cell manipulated through CSS properties and utility functions.

Built on modern web standards, CSS-Doodle provides a unique syntax combining CSS with JavaScript-like functions for randomization, mathematical operations, and conditional selection. The component includes specialized selectors like @random, @match, and @nth that work alongside standard CSS to target specific cells or patterns. Developers can also use the seed attribute to maintain consistent randomization across sessions, making it valuable for creating reproducible generative designs.

With installation options including CDN links, ES modules, and npm packages, CSS-Doodle integrates easily into both simple HTML pages and complex build systems. The tool's limitation is essentially the limit of CSS itself, pushing the boundaries of what's possible with pure CSS while maintaining accessibility and performance. Its ability to create intricate patterns through declarative markup makes it particularly useful for data visualization, decorative elements, and experimental web design projects.