Note to first-time contributors: Please open a discussion post in Discussions and describe your changes before submitting a pull request.
Before submitting, make sure you've checked the following:
Target branch: Please verify that the pull request targets the dev branch.
Description: Provide a concise description of the changes made in this pull request.
Changelog: Ensure a changelog entry following the format of Keep a Changelog is added at the bottom of the PR description.
Documentation: Have you updated relevant documentation Open WebUI Docs, or other documentation sources?
Dependencies: Are there any new dependencies? Have you updated the dependency versions in the documentation?
Testing: Have you written and run sufficient tests to validate the changes?
Code review: Have you performed a self-review of your code, addressing any coding standard issues and ensuring adherence to the project's coding standards?
Prefix: To clearly categorize this pull request, prefix the pull request title using one of the following:
BREAKING CHANGE: Significant changes that may affect compatibility
build: Changes that affect the build system or external dependencies
ci: Changes to our continuous integration processes or workflows
chore: Refactor, cleanup, or other non-functional code changes
docs: Documentation update or addition
feat: Introduces a new feature or enhancement to the codebase
fix: Bug fix or error correction
i18n: Internationalization or localization changes
perf: Performance improvement
refactor: Code restructuring for better maintainability, readability, or scalability
style: Changes that do not affect the meaning of the code (white space, formatting, missing semi-colons, etc.)
test: Adding missing tests or correcting existing tests
WIP: Work in progress, a temporary label for incomplete or ongoing work
Changelog Entry
Description
This PR introduces a resizable sidebar with persistent width, improves sidebar resizing performance using requestAnimationFrame, and updates layout responsiveness across the application. The sidebar width is now stored in localStorage and reflected via a CSS variable, ensuring consistent appearance and usability. All related layout components have been updated to use the new sidebar width variable for better responsiveness.
For improved user experience, sidebar resizing is only enabled on desktop environments. Minimum and maximum sidebar widths are enfoced.
Added
Resizable sidebar functionality with persistent width (saved in localStorage)
requestAnimationFrame(rAF)-based throttling for smooth sidebar resizing
New Svelte store: sidebarWidth (default: 260)
Sidebar resizing is available only on desktop; disabled on mobile
Minumum and maximum sidebar width constraints (min: 220px, max: 480px)
Changed
Updated all layout and container components to use var(--sidbar-width) instead of a fixed width (260px)
Sidebar width styling updated for better responsiveness and max-width handling
Deprecated
None
Removed
Hardcoded sidebar width values in layout and container components
Fixed
Sidebar resizing performance and responsiveness issues
Security
No security-related changes
Breaking Changes
BREAKING CHANGE: Sidebar width is now controlled via a CSS variable and Svlete store, replacing previous hardcoded values. Custom styles or integrations relying on the old fixed width may require updates.
Additional Information
This PR imroves the user experience on both desktop and mobile by making the sidebar more flexible and responsive.
By submitting this pull request, I confirm that I have read and fully agree to the Contributor License Agreement (CLA), and I am providing my contributions under its terms.
🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.
## 📋 Pull Request Information
**Original PR:** https://github.com/open-webui/open-webui/pull/17282
**Author:** [@SukJinKim](https://github.com/SukJinKim)
**Created:** 9/9/2025
**Status:** 🔄 Open
**Base:** `dev` ← **Head:** `dev`
---
### 📝 Commits (5)
- [`00fcd27`](https://github.com/open-webui/open-webui/commit/00fcd27f5712b90d24c697794dbe862e8315adeb) fix: update ChatItem title display to truncate long text
- [`7002b75`](https://github.com/open-webui/open-webui/commit/7002b750c6b9ed7be10bb67ddb52acd4abee3321) feat: implement resizable sidebar with persistent width
- [`1d7941c`](https://github.com/open-webui/open-webui/commit/1d7941c54ec999d73756e2d0ff9daa229e4a1f11) feat: move resizer handler for sidebar to improve layout responsiveness
- [`9f592ad`](https://github.com/open-webui/open-webui/commit/9f592ad45302e2c6b6de409d549509f4131d92cc) feat: enhance sidebar resizing performance with requestAnimationFrame
- [`fa8a6e1`](https://github.com/open-webui/open-webui/commit/fa8a6e1c4d4d2b10c17248f9665509da93c5e5f6) fix: update sidebar width styling for improved responsiveness
### 📊 Changes
**14 files changed** (+108 additions, -18 deletions)
<details>
<summary>View changed files</summary>
📝 `src/lib/components/channel/Channel.svelte` (+1 -1)
📝 `src/lib/components/chat/Chat.svelte` (+2 -2)
📝 `src/lib/components/chat/MessageInput/FilesOverlay.svelte` (+1 -1)
📝 `src/lib/components/layout/Sidebar.svelte` (+92 -5)
📝 `src/lib/components/layout/Sidebar/ChatItem.svelte` (+1 -1)
📝 `src/lib/components/workspace/Knowledge/KnowledgeBase.svelte` (+1 -1)
📝 `src/lib/stores/index.ts` (+3 -0)
📝 `src/routes/(app)/+layout.svelte` (+1 -1)
📝 `src/routes/(app)/admin/+layout.svelte` (+1 -1)
📝 `src/routes/(app)/home/+layout.svelte` (+1 -1)
📝 `src/routes/(app)/notes/+page.svelte` (+1 -1)
📝 `src/routes/(app)/notes/[id]/+page.svelte` (+1 -1)
📝 `src/routes/(app)/playground/+layout.svelte` (+1 -1)
📝 `src/routes/(app)/workspace/+layout.svelte` (+1 -1)
</details>
### 📄 Description
# Pull Request Checklist
### Discussions: #7765, #7909
### Note to first-time contributors: Please open a discussion post in [Discussions](https://github.com/open-webui/open-webui/discussions) and describe your changes before submitting a pull request.
**Before submitting, make sure you've checked the following:**
- [x] **Target branch:** Please verify that the pull request targets the `dev` branch.
- [x] **Description:** Provide a concise description of the changes made in this pull request.
- [x] **Changelog:** Ensure a changelog entry following the format of [Keep a Changelog](https://keepachangelog.com/) is added at the bottom of the PR description.
- [x] **Documentation:** Have you updated relevant documentation [Open WebUI Docs](https://github.com/open-webui/docs), or other documentation sources?
- [x] **Dependencies:** Are there any new dependencies? Have you updated the dependency versions in the documentation?
- [x] **Testing:** Have you written and run sufficient tests to validate the changes?
- [x] **Code review:** Have you performed a self-review of your code, addressing any coding standard issues and ensuring adherence to the project's coding standards?
- [x] **Prefix:** To clearly categorize this pull request, prefix the pull request title using one of the following:
- **BREAKING CHANGE**: Significant changes that may affect compatibility
- **build**: Changes that affect the build system or external dependencies
- **ci**: Changes to our continuous integration processes or workflows
- **chore**: Refactor, cleanup, or other non-functional code changes
- **docs**: Documentation update or addition
- **feat**: Introduces a new feature or enhancement to the codebase
- **fix**: Bug fix or error correction
- **i18n**: Internationalization or localization changes
- **perf**: Performance improvement
- **refactor**: Code restructuring for better maintainability, readability, or scalability
- **style**: Changes that do not affect the meaning of the code (white space, formatting, missing semi-colons, etc.)
- **test**: Adding missing tests or correcting existing tests
- **WIP**: Work in progress, a temporary label for incomplete or ongoing work
# Changelog Entry
### Description
- This PR introduces a `resizable sidebar` with persistent width, improves sidebar resizing performance using requestAnimationFrame, and updates layout responsiveness across the application. The sidebar width is now stored in localStorage and reflected via a CSS variable, ensuring consistent appearance and usability. All related layout components have been updated to use the new sidebar width variable for better responsiveness.
- For improved user experience, sidebar resizing is `only enabled on desktop environments`. Minimum and maximum sidebar widths are enfoced.
### Added
- Resizable sidebar functionality with persistent width (saved in localStorage)
- requestAnimationFrame(rAF)-based throttling for smooth sidebar resizing
- New Svelte store: `sidebarWidth` (default: 260)
- Sidebar resizing is available only on desktop; disabled on mobile
- Minumum and maximum sidebar width constraints (min: 220px, max: 480px)
### Changed
- Updated all layout and container components to use `var(--sidbar-width)` instead of a fixed width (260px)
- Sidebar width styling updated for better responsiveness and max-width handling
### Deprecated
- None
### Removed
- Hardcoded sidebar width values in layout and container components
### Fixed
- Sidebar resizing performance and responsiveness issues
### Security
- No security-related changes
### Breaking Changes
- **BREAKING CHANGE**: Sidebar width is now controlled via a CSS variable and Svlete store, replacing previous hardcoded values. Custom styles or integrations relying on the old fixed width may require updates.
---
### Additional Information
- This PR imroves the user experience on both desktop and mobile by making the sidebar more flexible and responsive.
### Screenshots or Videos
- [Resizable sidebar(on desktop)](https://www.youtube.com/watch?v=MlMoNygv1jE)
[](https://www.youtube.com/watch?v=MlMoNygv1jE)
- [Resizable sidebar(on mobile)](https://www.youtube.com/watch?v=-q0VXK3u0Qg)
[](https://www.youtube.com/watch?v=-q0VXK3u0Qg)
### Contributor License Agreement
By submitting this pull request, I confirm that I have read and fully agree to the [Contributor License Agreement (CLA)](/CONTRIBUTOR_LICENSE_AGREEMENT), and I am providing my contributions under its terms.
---
<sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>
Blocking a user prevents them from interacting with repositories, such as opening or commenting on pull requests or issues. Learn more about blocking a user.
📋 Pull Request Information
Original PR: https://github.com/open-webui/open-webui/pull/17282
Author: @SukJinKim
Created: 9/9/2025
Status: 🔄 Open
Base:
dev← Head:dev📝 Commits (5)
00fcd27fix: update ChatItem title display to truncate long text7002b75feat: implement resizable sidebar with persistent width1d7941cfeat: move resizer handler for sidebar to improve layout responsiveness9f592adfeat: enhance sidebar resizing performance with requestAnimationFramefa8a6e1fix: update sidebar width styling for improved responsiveness📊 Changes
14 files changed (+108 additions, -18 deletions)
View changed files
📝
src/lib/components/channel/Channel.svelte(+1 -1)📝
src/lib/components/chat/Chat.svelte(+2 -2)📝
src/lib/components/chat/MessageInput/FilesOverlay.svelte(+1 -1)📝
src/lib/components/layout/Sidebar.svelte(+92 -5)📝
src/lib/components/layout/Sidebar/ChatItem.svelte(+1 -1)📝
src/lib/components/workspace/Knowledge/KnowledgeBase.svelte(+1 -1)📝
src/lib/stores/index.ts(+3 -0)📝
src/routes/(app)/+layout.svelte(+1 -1)📝
src/routes/(app)/admin/+layout.svelte(+1 -1)📝
src/routes/(app)/home/+layout.svelte(+1 -1)📝
src/routes/(app)/notes/+page.svelte(+1 -1)📝
src/routes/(app)/notes/[id]/+page.svelte(+1 -1)📝
src/routes/(app)/playground/+layout.svelte(+1 -1)📝
src/routes/(app)/workspace/+layout.svelte(+1 -1)📄 Description
Pull Request Checklist
Discussions: #7765, #7909
Note to first-time contributors: Please open a discussion post in Discussions and describe your changes before submitting a pull request.
Before submitting, make sure you've checked the following:
devbranch.Changelog Entry
Description
resizable sidebarwith persistent width, improves sidebar resizing performance using requestAnimationFrame, and updates layout responsiveness across the application. The sidebar width is now stored in localStorage and reflected via a CSS variable, ensuring consistent appearance and usability. All related layout components have been updated to use the new sidebar width variable for better responsiveness.only enabled on desktop environments. Minimum and maximum sidebar widths are enfoced.Added
sidebarWidth(default: 260)Changed
var(--sidbar-width)instead of a fixed width (260px)Deprecated
Removed
Fixed
Security
Breaking Changes
Additional Information
Screenshots or Videos
Resizable sidebar(on desktop)
Resizable sidebar(on mobile)
Contributor License Agreement
By submitting this pull request, I confirm that I have read and fully agree to the Contributor License Agreement (CLA), and I am providing my contributions under its terms.
🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.