Streamdown 2.2 - animated streaming and better support for custom HTML
Streamdown 2.2 ships animated text streaming — making AI chat interfaces feel less robotic.
Why it matters
A developer tool update that improves the UX layer for AI chat products. Relevant to founders building AI applications who need polished streaming experiences, but incremental infrastructure rather than strategic business news.
The key facts
13 to knowPer-word animated text streaming for AI chat interfaces
Improved custom HTML handling with allowedTags support
Drop-in ReactMarkdown compatibility (one-line migration)
HTML tag stripping during streaming to prevent visual glitches
Bundled-language aliases for JavaScript, TypeScript, Shell
Security fixes across tables, code blocks, LaTeX, Mermaid diagrams
CommonJS builds removed
Per-word text animation now built-in via animated prop
ReactMarkdown compatibility—one-line migration path
Improved HTML tag handling prevents visual glitches during streaming
Support for custom HTML attributes via allowedTags
Bundled language aliases for JS, TS, shell
Security and rendering fixes across tables, code blocks, LaTeX, Mermaid
Go to the source
Vercel Blogvercel.com
Publisher excerpt: Streamdown 2.2 delivers animated per-word text streaming, improved custom HTML handling, and drop-in compatibility with ReactMarkdown - making it easier to adopt Streamdown in existing projects. By importing the Streamdown stylesheet and enabling the new animated prop, streaming content renders…