feat: create toc component

[araujogui]

Description

Creates a Table-of-contents component for use on small and medium devices

Validation

Light:

Dark:

Related Issues

Related to nodejs/doc-kit#560

Check List

• I have read the Contributing Guidelines and made commit messages that follow the guideline.
• I have run pnpm format to ensure the code follows the style guide.
• I have run pnpm test to check if all tests are passing.
• I have run pnpm build to check if the website builds without errors.
• I've covered new added functionality with unit tests if necessary.

[vercel]

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Project	Deployment	Review	Updated (UTC)
nodejs-org	Ready	Preview	Jan 22, 2026 4:11pm

[github-actions]

👋 Codeowner Review Request

The following codeowners have been identified for the changed files:

Team reviewers: @nodejs/nodejs-website

Please review the changes when you have a chance. Thank you! 🙏

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.96%. Comparing base (dbf3711) to head (0528249).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8560      +/-   ##
==========================================
- Coverage   75.01%   74.96%   -0.05%     
==========================================
  Files         103      103              
  Lines        9037     9037              
  Branches      311      312       +1     
==========================================
- Hits         6779     6775       -4     
- Misses       2256     2260       +4     
  Partials        2        2              

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[Copilot]

Pull request overview

This PR introduces a new Table of Contents component designed for small and medium devices. The component provides a collapsible navigation aid that allows users to quickly jump to different sections of a page using heading anchors.

Changes:

• Created a new TableOfContents component with configurable depth filtering for headings
• Added Storybook stories demonstrating default and custom depth configurations
• Implemented responsive styling that displays only on small/medium devices (hidden on large screens) with dark mode support

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
packages/ui-components/src/Common/TableOfContents/index.tsx	Main component implementation with filtering logic and collapsible details element
packages/ui-components/src/Common/TableOfContents/index.stories.tsx	Storybook stories demonstrating component usage with sample heading data
packages/ui-components/src/Common/TableOfContents/index.module.css	Styling for the component with responsive breakpoints and theme variants

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[AugustinMauroy]

Any plan for an active item ?

[araujogui]

Any plan for an active item ?

I don't think it is necessary because this component is intended to link users to sections within the same page.

[AugustinMauroy]

Any plan for an active item ?

I don't think it is necessary because this component is intended to link users to sections within the same page.

Okay make sense. also I just checked on our current metabar we didn't have this kind of thing so no problem

[AugustinMauroy]

LGMT & thanks for putting effort there

[github-actions]

Lighthouse Results

URL	Performance	Accessibility	Best Practices	SEO	Report
/en	🟢 98	🟢 96	🟢 100	🟢 100	🔗
/en/about	🟢 99	🟢 97	🟢 100	🟠 88	🔗
/en/about/previous-releases	🟢 99	🟢 100	🟢 100	🟢 100	🔗
/en/download	🟢 98	🟢 100	🟢 100	🟢 100	🔗
/en/download/archive/current	🟢 100	🟢 100	🟢 100	🟢 100	🔗
/en/blog	🟢 100	🟢 100	🟢 96	🟢 100	🔗

[ovflowd]

SGTM!

[malav2110]

Great work @araujogui .
Question: Do we want to update version number in packages > ui-components > package.json by running pnpm version patch in ui-components directory ?