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Barebones tanstack start project hydration warning #6037

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Description

@pycanis

Which project does this relate to?

Start

Describe the bug

I've got completely clean tanstack start setup but getting hydration warning in the console.

Your Example Website or App

https://github.com/pycanis/tanstack-start-hydration-issue

Steps to Reproduce the Bug or Issue

  1. bun install
  2. bun dev
  3. Go to localhost:3000
  4. Open console

Expected behavior

No hydration warning.

Screenshots or Videos

No response

Platform

  • Router / Start Version: 1.140.0
  • OS: macOS
  • Browser: Firefox

Additional context

No response

Activity

  1. coderabbitai commented on Dec 7, 2025

    @coderabbitai
    Contributor

    📝 CodeRabbit Plan Mode

    Generate an implementation plan and agent prompts for this issue.

    • Create Plan
    Examples

    🔗 Related PRs

    #5903 - fix(solid-start): fix hydration regression in 1.136.9 [merged] | packages/solid-router/src/Asset.tsx:
    """

    AI-generated summary of changes

    • On client-side mounting, the Script component now renders nothing (null) instead of an empty script tag when not server-rendered, changing hydration behavior by avoiding an empty DOM node in the client render path. All other logic (server path, script creation for src or inline children) remains unchanged.

    Alterations to the declarations of exported or public entities

    • No exported or public entity signatures were changed.

    Manifest File Analyzer

    Estimated code review effort: Medium
    """

    👤 Suggested Assignees

    • birkskyum

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  2. brenelz commented on Dec 7, 2025

    @brenelz
    Contributor

    I just checked out your github repo and didn't get any hydration warnings. Are you sure its not some browser extension or something causing it?

  3. jakub-msqt commented on Dec 7, 2025

    @jakub-msqt

    You're right, it was https://addons.mozilla.org/en-US/firefox/addon/videospeed/

    Sorry, the issue can be closed.

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