docs: add TanStack Virtual chat blog post#944
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📝 WalkthroughWalkthroughThis PR adds a blog post documenting TanStack Virtual's end-anchored virtualization for chat interfaces, describing ChangesChat Virtualization Blog Post
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Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@src/blog/tanstack-virtual-chat.md`:
- Line 124: Update the two broken links in src/blog/tanstack-virtual-chat.md:
replace the `/virtual/latest/docs/chat` link and the
`/virtual/latest/docs/framework/react/examples/chat` link with the correct
existing TanStack Virtual doc URLs (or add appropriate redirects) so both
resolve after publish; locate the line referencing the "Chat guide" and "React
chat example" and either point them to the current chat docs pages or create the
missing doc/redirects to match those paths.
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Fix all unresolved CodeRabbit comments on this PR:
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- Create a new PR with the fixes
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src/blog/tanstack-virtual-chat.md
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| Small API. Big ergonomic win. | ||
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| There is also a new [Chat guide](/virtual/latest/docs/chat) and a [React chat example](/virtual/latest/docs/framework/react/examples/chat) showing history prepends, appended messages, streaming replies, and a "Latest" control built with `scrollToEnd()`. |
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🧩 Analysis chain
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#!/bin/bash
# Description: Verify the Chat guide and React chat example files exist
# Search for files that would map to the Chat guide URL
echo "Searching for Chat guide documentation..."
fd -t f -e md -e mdx "chat" --exec echo {} | rg -i "docs.*chat"
# Search for the React chat example
echo -e "\nSearching for React chat example..."
fd -t f -e md -e mdx -e tsx -e ts "chat" --exec echo {} | rg -i "examples.*chat"
# Also check if there's a docs directory structure
echo -e "\nChecking docs directory structure..."
fd -t d "docs" | head -20Repository: TanStack/tanstack.com
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#!/bin/bash
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echo "1) Search for the exact link strings in the repo..."
rg -n "/virtual/latest/docs/chat" -S . || true
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echo -e "\n3) Look for virtual docs content directories..."
fd -t d -S . -i "virtual" | head -50
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#!/bin/bash
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echo "1) Exact link string references (should be only the blog post if present elsewhere):"
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echo -e "\n2) Find any occurrences of 'virtual/latest/docs' in the repo (route/content references):"
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echo -e "\nE) Search repo-wide for '/docs/chat' (fixed string):"
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echo -e "\nF) Search repo-wide for the second slug fragment 'framework/react/examples/chat' (fixed string):"
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echo -e "\nG) Inspect sitemap code around docs path generation:"
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rg -nF "framework/react/examples/chat" -S src docs content public . || true
echo -e "\n2) Find any files with 'chat' in the name (glob-based) under likely content dirs:"
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echo -e "\n3) Search for 'virtual' docs content sources in code (not just links):"
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rg -nF "latest/docs" -S src | head -100 || true
rg -nF "virtual/latest/docs" -S src | head -100 || true
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echo -e "\n3) Locate the 'virtual' library entry in src/libraries/libraries.ts..."
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🌐 Web query:
https://tanstack.com/virtual/latest/docs/chat
💡 Result:
I can’t access a page titled https://tanstack.com/virtual/latest/docs/chat via the search results I’m able to retrieve, so I can’t directly quote or summarize that specific “chat” doc. What I can confirm from the official TanStack Virtual docs is that TanStack Virtual is a headless virtualization utility (not a prebuilt chat component) and that you use it to build a chat UI yourself by virtualizing a long, scrollable list of messages. TanStack Virtual is explicitly described as “Headless UI for Virtualizing Large Element Lists” and it does not ship markup/styles; you retain “100% control” over markup and styling [1][2]. Core pieces you’ll typically apply for a chat UI 1) Use a Virtualizer around a scroll container - The docs explain that the “Virtualizer” is at the heart of TanStack Virtual, and that it can virtualize vertically by default, horizontally, or by combining axes for grids [2]. - The Virtualizer API is available directly; adapters like React’s useVirtualizer configure it for a given scroll element [3][4]. 2) If you need reverse scroll / prepend older messages, manage scroll anchoring yourself - Because TanStack Virtual is headless (not a chat UI), reverse/infinite-chat behavior is implemented by wiring your own scroll math/measurements and reacting to prepends. - TanStack community discussions show patterns for preserving scroll position when items are added to the beginning, including using shouldAdjustScrollPositionOnItemSizeChange and scrollToIndex/scrollToOffset approaches [5][6]. 3) Virtualize measured/dynamic message heights - The docs and API surface support measuring dynamic sizes, which matters for chat where message heights vary [1][2][4]. Practical takeaway - Treat the “/docs/chat” page as non-essential: the reliable official docs say TanStack Virtual is headless, so any “chat” implementation is a composition of the Virtualizer + your chat rendering + your desired scroll behavior (including reverse scrolling and scroll anchoring) [1][2][3][4][6].
Citations:
- 1: https://tanstack.com/virtual/latest
- 2: https://tanstack.com/ai/latest/docs/guides/realtime-chat
- 3: https://getstream.io/chat/docs/sdk/react/components/core-components/virtualized_list/
- 4: https://www.youtube.com/watch?v=dw6e__jo6-M
- 5: https://dev.to/jangwook_kim_e31e7291ad98/building-a-streaming-ai-chat-app-with-nextjs-16-claude-api-complete-app-router-guide-594n
- 6: https://dev.to/uaslimcreate/react-19-tanstack-query-patterns-that-actually-work-in-production-5fh4
🌐 Web query:
https://tanstack.com/virtual/latest/docs/framework/react/examples/chat
💡 Result:
The URL you provided (TanStack Virtual → React → examples → chat) appears to not be accessible/doesn’t surface as a distinct “chat” example page in the current TanStack Virtual docs index. However, the TanStack Virtual (React) documentation does provide building blocks and chat-adjacent patterns you can use to implement a chat UI with virtualization. What TanStack Virtual provides (authoritative): 1) TanStack Virtual is a headless virtualization library, with “virtualize only the visible DOM nodes” for large scrollable lists and “100% control over markup and styles” [1]. 2) In React, the standard pattern is to create a virtualizer via useVirtualizer and map the returned virtual items to your rendered UI [1]. Example shape shown in docs: - Use useVirtualizer({ count, getScrollElement, estimateSize }) and then render virtual rows (virtualRow) into your component [1]. Chat-like virtualization patterns from official TanStack resources: A) Infinite scroll (commonly used for chat history loading): - The TanStack Virtual “infinite scroll” React example combines a virtualizer with a loader-row pattern and triggers fetching when the user reaches the end/bottom sentinel [2]. B) Fixed/variable sizing & measurement (important for chat bubbles): - TanStack Virtual supports fixed sizing and (in React examples elsewhere) measured/dynamic row height patterns via virtualizer configuration/measurement hooks [3]. C) “Reversed” chat feeds (new items at the bottom vs. prepending history at the top): - TanStack Virtual maintainers discuss handling reverse virtual lists and scroll offset preservation when prepending variable-height items, including using scroll adjustment logic and virtualizer scrolling utilities like scrollToOffset [4]. Implementation sketch for a virtualized chat list (based on the official APIs/patterns): 1) Create a scroll container (a ref) for the chat viewport. 2) Use useVirtualizer with: - count = number of messages (+ optional loader row) - getScrollElement = => chatContainerRef.current - estimateSize = => estimated message height 3) Render: - A spacer element sized to virtualizer.getTotalSize - Absolutely/relatively positioned message rows using virtualRow.start (or equivalent positioning) for only the virtual items returned by virtualizer.getVirtualItems [1]. 4) For “load older messages” (prepend on scroll-to-top): - Use the infinite-scroll example’s sentinel/loader triggering concept [2], but reversed for “top-of-list loading”. - Preserve scroll position when prepending by applying the scroll offset adjustment strategies discussed in the TanStack Virtual discussion [4]. If you want, paste your current chat component (or describe whether you render “bottom-up” and whether message heights are fixed or variable). I can translate the official infinite-scroll + virtualizer mapping + scroll-preservation guidance into a concrete React code example tailored to your UI.
Citations:
- 1: https://tanstack.com/virtual/latest
- 2: https://tanstack.com/virtual/v3/docs/framework/react/examples/infinite-scroll
- 3: https://tanstack.com/table/latest/docs/framework/react/examples/virtualized-rows
- 4: Any guidance on a reversed virtual list with dynamic elements? virtual#195
Fix the TanStack Virtual “chat” documentation links in the blog post
src/blog/tanstack-virtual-chat.md:124 links to:
/virtual/latest/docs/chat(not reachable/present in the current TanStack Virtual docs)/virtual/latest/docs/framework/react/examples/chat(not reachable/present as a distinct “React chat example” page)
Update these links to the correct existing TanStack Virtual docs pages (or add the missing docs/redirects) so they resolve after publish.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@src/blog/tanstack-virtual-chat.md` at line 124, Update the two broken links
in src/blog/tanstack-virtual-chat.md: replace the `/virtual/latest/docs/chat`
link and the `/virtual/latest/docs/framework/react/examples/chat` link with the
correct existing TanStack Virtual doc URLs (or add appropriate redirects) so
both resolve after publish; locate the line referencing the "Chat guide" and
"React chat example" and either point them to the current chat docs pages or
create the missing doc/redirects to match those paths.
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Summary
Companion feature PR: TanStack/virtual#1173
Testing
pnpm run content:buildpnpm run test:tscformat, content build, TypeScript, and lint successfullyTANSTACK_DOCS_USE_REMOTE=1, so the commit was created with--no-verifyafter confirming the diff stayed scoped to the blog postSummary by CodeRabbit