# Streamdown 2.2 - animated streaming and better support for custom HTML By Steven Van · 2025-09-08 The update also adds ReactMarkdown compatibility, drops CommonJS builds, and fixes rendering across tables, code, LaTeX and Mermaid diagrams. [Vercel]()'s Streamdown library reaches [version 2.2](), adding animated per-word text streaming and making it easier to adopt in existing projects. - A new **animated** prop, combined with importing the Streamdown stylesheet, renders streaming content with smooth per-word animation, aimed at AI chat interfaces and other real-time text applications. - The **components** prop now accepts custom HTML attributes by adding elements to **allowedTags**, and the Remend engine strips incomplete HTML tags during streaming to prevent visual glitches from partial markup. - Streamdown now supports the remaining ReactMarkdown props, so projects using ReactMarkdown can switch to Streamdown as a one-line replacement without refactoring component configuration. - The release removes CommonJS builds, adds bundled-language aliases for common JavaScript, TypeScript and shell labels, and includes rendering and security fixes across tables, code blocks, LaTeX and Mermaid diagrams. [![]()]() ![Vercel]() Vercel The platform for frontend developers — deploy, preview, and scale web apps and AI agents with zero config. [View Vercel →]() [Original source]() [Read Streamdown 2.2 - animated streaming and better support for custom HTML on Creators Toolbox]() --- Canonical source: https://creatorstoolbox.com/blog/vercel-streamdown-2-2-animated-streaming-and-better-support-for-custom-html