JupyterLab Files

4.5.0

(Full Changelog)

New features added

• Add terminal search functionality #17691 (@ianthomas23)

Enhancements made

• Fix kernel status display in status bar #18047 (@Darshan808)
• Introduce DebuggerDisplayRegistry to provide context-aware display names for debugger panels #18043 (@arjxn-py)
• Introduce new token for the default IContentProvider #18027 (@martinRenou)
• Update Show more outputs button design #18021 (@andrii-i)
• Optimize content-visibility application #18013 (@Meriem-BenIsmail)
• Show execution count in breakpoints, callstack, and sources panels while debugging in console #18003 (@arjxn-py)
• Keep debugger state though kernel restarts #17972 (@gjmooney)
• Make DocumentManager dialogs customizable #17961 (@Darshan808)
• Systematise how base URL is obtained to allow swapping it more easily #17952 (@krassowski)
• Export the ContentProviderRegistry #17940 (@martinRenou)
• Make filebrowser breadcrumbs configurable #17932 (@Darshan808)
• Switch the default windowing mode to contentVisibility #17926 (@Meriem-BenIsmail)
• Pass context down in attachments resolver #17924 (@krassowski)
• Allow swapping the empty markdown cell placeholder (and translate it) #17920 (@krassowski)
• Enable the minimap for all windowing modes #17904 (@Meriem-BenIsmail)
• Debugger: Differentiate selected breakpoints with specific style #17893 (@HaudinFlorence)
• Use console for debugger evaluation #17892 (@gjmooney)
• Debugger: Visual indicator when debugger is paused #17891 (@arjxn-py)
• Add IUserAPIClient to make swapping UserManager easier #17884 (@krassowski)
• Provide context about the tag and attribute to the URL resolver #17882 (@krassowski)
• Debugger: Show cell execution count in breakpoint/call stack/source panel #17881 (@arjxn-py)
• Add file browser menu for creating new Python/R/Julia files #17848 (@martinRenou)
• Allow configuring toSkip for the SettingsEditor #17834 (@jtpio)
• Use content-visibility to render notebook cells more efficiently #17822 (@Meriem-BenIsmail)
• Use toolbar registry for log console #17814 (@gjmooney)
• Add a new addExtraLineOnCellMerge setting #17806 (@jtpio)
• Update to mermaid 11.10, marked 16.2 #17800 (@bollwyvl)
• Allow opening notebooks without starting a kernel #17798 (@jtpio)
• Allow to swap the URL resolver #17784 (@krassowski)
• Add the "Show Workspace Indicator" command to the palette #17780 (@jtpio)
• Auto-switch between light and dark mode when "Synchronize with System Settings" is enabled #17733 (@MUFFANUJ)
• Keep cell id when the user changes cell type #17731 (@afshin)
• Discover the app directory relative to the installed module #17721 (@zanieb)
• Show checkbox and buttons of Dialog component on separate lines #17696 (@MUFFANUJ)
• Add types for interrupt messages, and move them from shell to control channel #17684 (@krassowski)
• Add fold/unfold commands to menu and command palette #17677 (@Darshan808)
• Add a new allowFileUploads setting to the file browser #17676 (@jtpio)
• Dockerfile: Install less, vim, and nano #17670 (@rschroll)
• Describe args for all commands #17649 (@jtpio)
• Add audio-extension and video-extension #17636 (@jtpio)
• Add select all command for file browser listing #17571 (@RRosio)
• Add a selectionChanged signal to the file browser #17563 (@jtpio)
• Auto-open uploaded files with size and settings control #17556 (@Darshan808)
• Add a setting to configure the default log level for the Log Console #17547 (@jtpio)
• Add a signal when cells are pasted in the Notebook #17506 (@brichet)
• Add new CSS rule for expanding linked output to 100% height #17487 (@SylvainCorlay)
• Add an optional exportAs method to NbConvert.IManager #17482 (@jtpio)
• Reorder extra_labextensions_path to favor defaults #17476 (@peytondmurray)
• Use the system clipboard for copying and pasting cells #17445 (@yacchin1205)
• Add jump to executing/executed cell button #16880 (@Darshan808)

Bugs fixed

• Update lumino to v2025.11.13 #18108 (@krassowski)
• Use IntersectionObserver to disable containment for on-screen cells #18091 (@Meriem-BenIsmail)
• Fix layout trashing when navigating notebook cell-by-cell #18080 (@krassowski)
• Hide “Paused in Debugger” overlay when session terminates #18067 (@arjxn-py)
• Debugger: Fix breakpoints lost when closing modules #18063 (@HaudinFlorence)
• Fix allow-same-origin exception handling in sandbox when changing trust status #18049 (@skapin)
• Don't open default editor if a different kind of editor is already open #18034 (@robertstrauss)
• Fix debugger initialization for notebooks on reload #18028 (@arjxn-py)
• Only show hidden part of the path in the tooltip of ellipsis #18026 (@krassowski)
• Fix ObservableList.removeValue behaviour: if item isn't found, don't just remove the last item! #18019 (@robertstrauss)
• Fix breadcrumb drag-and-drop issues #18014 (@Darshan808)
• Fix race condition renaming unnamed files on first save #17982 (@shreve)
• Fix spurious scrollbar in output area due to prompt overlay #17981 (@shreve)
• Fix file drag-and-drop to breadcrumbs #17975 (@Darshan808)
• Delay content-visibility application to handle early CodeMirror initialization (Firefox) #17973 (@Meriem-BenIsmail)
• Prevent widget closure when Save As is cancelled #17956 (@Darshan808)
• Fix empty whitespace after large cell rendering #17949 (@Meriem-BenIsmail)
• Fix scrolling to targets within notebook #17928 (@krassowski)
• Debugger: fix adding a breakpoint on an empty line of code and reclicking after addition #17923 (@HaudinFlorence)
• Make file browser optional in file editor extension #17922 (@Ankitaupadhaya)
• Debugger: Only send the configurationDone message once as per the DAP #17912 (@martinRenou)
• Improve description of windowing mode in settings #17897 (@davidbrochart)
• Fix kernel status display in status bar #17894 (@Darshan808)
• Correctly dispose TerminalManager even if terminals are not available #17876 (@krassowski)
• Fix notebook toolbar item order #17866 (@Darshan808)
• Fix output prompt overlay height for large outputs #17863 (@Meriem-BenIsmail)
• Debugger: scroll to the highlighted line in source panel #17860 (@brichet)
• Prevent overlay of content from other columns when renaming a file in the file browser #17857 (@CrafterKolyan)
• Select file and accept dialog on file double click in FileDialog.getOpenFiles #17844 (@martinRenou)
• Fix broken toolbar updates due to missing 'clear' cases in switch statements for ObservableList #17837 (@Darshan808)
• Debugger: Preserve variables panel contents when switching editor focus #17830 (@arjxn-py)
• Send code to console #17824 (@gjmooney)
• Change default line wrap in default editor config #17818 (@gjmooney)
• Clear incomplete execution metadata when splitting running cells #17804 (@Darshan808)
• Activate Code Folding submenu only where it is supported #17803 (@Darshan808)
• Fix highlighting search on output cells and previous match skips #17797 (@itsmevichu)
• Don't create empty page_config in sys_prefix when disabled is empty #17791 (@gjmooney)
• Mark cell as dirty at execution start instead of after execution #17774 (@Darshan808)
• Preserve original cell during split to maintain kernel connections #17755 (@Darshan808)
• Exclude version 6.30.0 of ipykernel, which add a regression on the debugger #17744 (@brichet)
• Fix initial column sizes in FileDialog.getOpenFiles dialog #17737 (@martinRenou)
• Fix anchor navigation on sanitized HTML #17727 (@brichet)
• Fix file browser navigation with preferredDir #17723 (@Darshan808)
• Fix error when deleting a markdown cell with heading #17720 (@itsmevichu)
• Reduce UI blocking time when saving large notebooks by using file stream #17707 (@krassowski)
• Fix scrollbar behaviour when scrolling past long cell in full windowing mode #17705 (@krassowski)
• Normalize ToolbarButtonComponent dataset attributes with the data- prefix #17703 (@RRosio)
• Do not change silently when executing an empty cell #17701 (@brichet)
• Fix tab order for status bar items #17700 (@MUFFANUJ)
• Update @codemirror/view to v6.38.1, fixing lineWrap in defer mode #17698 (@krassowski)
• Fix auto completion on irrelevant cell types #17693 (@itsmevichu)
• Check minimum docker version when starting docker build #17675 (@rschroll)
• Fix uncoalesced cell stream outputs clearing #17672 (@Darshan808)
• Fix threadId being passed to the debugger #17667 (@kr-2003)
• Fix colors for CodeMirror panels #17666 (@krassowski)
• Create a subshell per target and kernel when using CommsOverSubshells.PerCommTarget #17634 (@ianthomas23)
• Prevent memory leak when rendering text stream #17628 (@krassowski)
• Fix cell toolbar enabled status with multiple notebooks #17625 (@MUFFANUJ)
• Add layout containment on viewport in windowed mode #17620 (@krassowski)
• Fix selection visibility in terminal while using Dark High Contrast theme #17618 (@MUFFANUJ)
• Fix setting allowed schemes on runtime using Sanitizer.setAllowedSchemes #17602 (@bsundaram1)
• Emit selectionChanged on model refresh #17596 (@jtpio)
• Fix error handing in extension manager (typo and undefined variable) #17592 (@Darshan808)
• Fixes for accessibility issues reported on missing ARIA roles #17591 (@nkn2022)
• Fix stringmd5 in docker image if both md5sum and md5 are present #17590 (@ritzdevp)
• Improve the Table of Contents logic to handle more heading definitions #17583 (@itsmevichu)
• Ensure strings with yellow background in tracebacks are visible #17577 (@EtiennePelletier)
• Add standby callback to lumino polls #17567 (@mahendrapaipuri)
• Fix stdin input triggering cell re-execution on Shift+Enter #17565 (@Darshan808)
• fileeditor-extension: fix handling of launcher, commands and menu entries on specsChanged #17550 (@jtpio)
• Fix Settings Editor incorrectly resetting values to default in filtered view #17540 (@yukiiii04)
• Update widget flag on attaching cell to viewport #17532 (@trungleduc)
• Fix rendering of long cell editors in windowed notebook #17528 (@krassowski)
• Fix incorrect ARIA labels in the MainAreaWidget #17527 (@dnlzrgz)
• Upgrade CodeMirror packages to latest #17526 (@krassowski)
• Update lumino to v2025.4.30 to pull menu aria fix #17525 (@krassowski)
• Fix editing shortcuts on Safari (allow shortcut edit button to receive focus) #17511 (@minrk)
• Enable save in collaborative mode #17508 (@Darshan808)
• Add aria-hidden to icons (<svg> elements) which do not have a title #17472 (@nkn2022)
• Allow grid and flexbox style attributes during Markdown/HTML sanitization #17408 (@dotnetautor)
• Fix opening active notebook from kernel - custom drive #15958 (@itsmevichu)

Maintenance and upkeep improvements

• Drop altair installation in release test; migrate from deprecated vega_datasets to altair.datasets #18120 (@krassowski)
• Make usage2 server startup/teardown test more robust #18087 (@krassowski)
• Separate verdaccio install and startup to fix flaky release_test CI job #18082 (@krassowski)
• Update PyPI Downloads badge in README.md #18052 (@jtpio)
• Update to mermaid 11.12.1 #18046 (@bollwyvl)
• Revert "Fix kernel status display in status bar" #18038 (@krassowski)
• Fix flaky test Drag file from nested directory to parent via breadcrumb #18015 (@Darshan808)
• Bandaid: pin ipykernel on CI to pre-7.0 #17992 (@krassowski)
• Add UI testing on Firefox (ignore snapshot differences) #17965 (@krassowski)
• Update to Playwright 1.56.0 #17960 (@jtpio)
• Temporarily pin ipykernel to avoid CI breakage with 7.0 pre-release #17957 (@arjxn-py)
• Fix case of 'Debugger console' to 'Debugger Console' #17939 (@jtpio)
• Make debugger console tests more robust and faster #17937 (@krassowski)
• Improve robustness of inline-completer UI tests #17931 (@ianthomas23)
• Fix integrity checks on CI #17927 (@krassowski)
• Ignore npmjs.com in check-links #17915 (@jtpio)
• Update to Playwright 1.55.1 #17914 (@jtpio)
• Fix failing mermaid snapshots test #17845 (@krassowski)
• Avoid ipykernel 7.0.0a2 in CI #17778 (@ianthomas23)
• Re-add workflow to reject changes to staging #17776 (@jtpio)
• Stabilize Code Folding Tests #17773 (@Darshan808)
• Check app.shell.currentWidget for updating the tab title, if available #17772 (@jtpio)
• Fix labeller config for audio/video extensions #17768 (@krassowski)
• Update to Playwright 1.54.2 #17760 (@jtpio)
• Add logs to the server startup in the js-testing tests #17754 (@jtpio)
• Pin to httpx<1 #17746 (@jtpio)
• Bump form-data from 4.0.2 to 4.0.4 #17717 (@dependabot)
• Bump brace-expansion from 1.1.11 to 1.1.12 #17699 (@dependabot)
• Add more retries on the frequently failing test #17689 (@krassowski)
• Bump actions/cache from 3 to 4 in the actions group #17674 (@dependabot)
• Update library name, minor edit #17671 (@afshin)
• Fix terminal visual regression snapshots test failures #17656 (@krassowski)
• Update UI Tests Documentation snapshots #17654 (@jtpio)
• Update mermaid 11.7.0 #17641 (@bollwyvl)
• Drop manual Firefox install, add playwright cache #17631 (@krassowski)
• Update to Playwright 1.53 #17622 (@jtpio)
• Remove the need for ILabShell for the inspector plugins #17608 (@jtpio)
• Use hatch to get the version #17559 (@krassowski)
• Temporarily ignore links to github.com #17544 (@krassowski)
• Bump actions/create-github-app-token from 1 to 2 in the actions group #17529 (@dependabot)
• Bump tough-cookie from 4.1.2 to 4.1.4 #17502 (@dependabot)
• Bump ws from 8.16.0 to 8.18.1 in /jupyterlab/tests/mock_packages/test-hyphens-underscore #17500 (@dependabot)
• Bump ws from 8.16.0 to 8.18.1 in /jupyterlab/tests/mock_packages/test_no_hyphens #17499 (@dependabot)
• Update to Playwright 1.52.0 #17483 (@jtpio)

Documentation improvements

• Update JupyterLab pre-release version to 4.5.0rc1 #18111 (@krassowski)
• Clean up references to Gitpod #18107 (@jtpio)
• Update example for disabling buildAvailable #18075 (@Frank-Steiner)
• Update announcement from JupyterCon to JupyterLab 4.5.0 RC #18074 (@krassowski)
• Mention JupyterLab 4.5.0 RC in the installation instructions #18061 (@krassowski)
• Add plausible and logos to API docs #18059 (@krassowski)
• Update PyPI Downloads badge in README.md #18052 (@jtpio)
• Convert documentation to Markdown #18044 (@jtpio)
• Add plausible.io stats to the jupyterlab docs #18041 (@jasongrout)
• Document how to disable the file uploads via the settings #18040 (@jtpio)
• Fix changelog URLs #18031 (@krassowski)
• Update JupyterCon 2025 announcement links #17983 (@krassowski)
• User-facing changelog for JupyterLab 4.5 #17967 (@RRosio)
• Make DocumentManager dialogs customizable #17961 (@Darshan808)
• Fix parameter documentation issues in API reference #17954 (@krassowski)
• Add cross-references to API reference, fix missing packages in API #17953 (@krassowski)
• Systematise how base URL is obtained to allow swapping it more easily #17952 (@krassowski)
• Add JupyterCon banner and Jupyter colors #17906 (@choldgraf)
• Allow configuring toSkip for the SettingsEditor #17834 (@jtpio)
• Improve language/grammar in extensions documentation #17833 (@jrdnbradford)
• Reorganise and improve discoverability in documentation #17821 (@cmarmo)
• Remove Isabela Presedo-Floyd from current maintainers #17810 (@isabela-pf)
• Replace deprecated toolbarRegistry.registerFactory with toolbarRegistry.addFactory in docs #17799 (@krassowski)
• Update zoom link for weekly meetings in CORPORATE.md #17789 (@krassowski)
• Mark cell as dirty at execution start instead of after execution #17774 (@Darshan808)
• Stabilize Code Folding Tests #17773 (@Darshan808)
• Check app.shell.currentWidget for updating the tab title, if available #17772 (@jtpio)
• Fix anchor navigation on sanitized HTML #17727 (@brichet)
• Improve documentation for jupyter.lab.transform #17726 (@MUFFANUJ)
• Describe args for all commands #17649 (@jtpio)
• Fix link to zulip and icon in docs #17639 (@krassowski)
• Add audio-extension and video-extension #17636 (@jtpio)
• Documentation for Kernel Subshells #17623 (@MUFFANUJ)
• Added --yes to conda environment creation command #17605 (@kathatherine)
• Add a selectionChanged signal to the file browser #17563 (@jtpio)
• Add new entry to Postmortems in RELEASE.md #17505 (@jtpio)
• Add an optional exportAs method to NbConvert.IManager #17482 (@jtpio)
• Reorder extra_labextensions_path to favor defaults #17476 (@peytondmurray)

Contributors to this release

(GitHub contributors page for this release)

@afshin | @andrii-i | @Ankitaupadhaya | @arjxn-py | @bollwyvl | @brichet | @bsundaram1 | @choldgraf | @cmarmo | @CrafterKolyan | @Darshan808 | @davidbrochart | @dependabot | @dnlzrgz | @domoritz | @dotnetautor | @ellisonbg | @EtiennePelletier | @fcollonval | @Frank-Steiner | @github-actions | @gjmooney | @HaudinFlorence | @hxrshxz | @ianthomas23 | @isabela-pf | @itsmevichu | @jasongrout | @JasonWeill | @jrdnbradford | @jtpio | @jupyterlab-probot | @kathatherine | @kr-2003 | @krassowski | @lumberbot-app | @mahendrapaipuri | @martinRenou | @Meriem-BenIsmail | @minrk | @MUFFANUJ | @nkn2022 | @peytondmurray | @pre-commit-ci | @ritzdevp | @robertstrauss | @RRosio | @rschroll | @shreve | @skapin | @superlevure | @SylvainCorlay | @tonyfast | @trungleduc | @williamstein | @yacchin1205 | @yukiiii04 | @zanieb | @Zsailer