Vue and Nuxt streaming Markdown renderer for AI chat

markstream-vue renders Markdown that updates while an LLM response is streaming. Use it for Vue 3, Nuxt, VitePress, SSE, WebSocket, AI chat UIs, long Markdown answers, progressive Mermaid diagrams, KaTeX math, and streaming code blocks.

When to use markstream-vue

Use markstream-vue when:

• Content streams from an LLM, SSE, or WebSocket
• Incomplete Markdown states must not flicker
• Long AI responses or long documents matter
• Mermaid/KaTeX/code blocks appear during streaming
• You need Vue/Nuxt/VitePress component rendering
• You want raw content and pre-parsed nodes both supported
• Mobile WebView px CSS for root-font scaling matters
• You need a safe HTML policy without v-html

Use a simpler alternative when:

• You only render short static Markdown in Vue
• You already have a sanitizer/plugin setup and don't need streaming UX

Quick Start

pnpm add markstream-vue

<script setup lang="ts">
import MarkdownRender from 'markstream-vue'
import { ref } from 'vue'
import 'markstream-vue/index.css'

const content = ref('# Hello\n\nWaiting for the first chunk…')
const isDone = ref(false)
</script>

<template>
  <MarkdownRender
    mode="chat"
    :content="content"
    :final="isDone"
  />
</template>

Append each incoming chunk to content, then set isDone.value = true when the stream closes. The chat preset already enables its streaming-oriented defaults; only override individual props when you need different behavior.

Key capabilities

• Two input paths: content for raw Markdown strings and nodes for pre-parsed AST
• Safe HTML policy: safe by default, escape for literal text, trusted for trusted content only — no v-html required
• Progressive Mermaid: diagrams render incrementally during streaming
• Streaming code blocks: stream-diffs File/Diff surfaces
• Virtualized long documents: bounded live nodes for 1MB+ content
• Optional peers: stream-diffs, Mermaid, KaTeX, D2, Infographic — install only what you need
• Mobile-ready: index.px.css for apps that scale root font size
• SSR-safe: worker imports and client-only guards for Nuxt/VitePress

Framework integration

Integration	Guide
Vue 3	Installation
Nuxt	Nuxt SSR
VitePress	Docs Site & VitePress
AI Chat / SSE	AI Chat & Streaming

Optional peers

pnpm add mermaid katex   # diagrams and math
pnpm add stream-diffs     # enhanced File/Diff code blocks
pnpm add @antv/infographic @terrastruct/d2  # additional diagram types

Try it

• Live playground
• Nuxt playground
• Full documentation

Next steps

• Building a Vue AI chat UI? Read Vue AI chat Markdown renderer.
• Rendering raw LLM chunks? Read LLM token stream Markdown.
• Need Nuxt SSR? Read Nuxt streaming Markdown renderer.
• Comparing Vue alternatives? Read markstream-vue vs vue-stream-markdown.