beautiful-mermaid: a TypeScript library that renders Mermaid diagrams as SVGs or ASCII art.
Key features:
• Dual output modes (SVG for UIs, ASCII/Unicode for terminals)
• 15 built-in themes with live CSS-based switching
• Full Shiki compatibility for VS Code theme integration
• Zero DOM dependencies
• Supports flowcharts, state, sequence, class, and ER diagrams
Perfect for AI coding assistants, CLI tools, and documentation generators that need themed diagrams in both graphical and text-only environments.