jupyterlab 4.5.3

v4.5.3

on Python PyPI

4.5.3

(Full Changelog)

Bugs fixed

• Fix error in console when the debugger switch from a module to another #18352 (@brichet)
• Fix focus of replace buttons in the document search box #18362 (@IsabelParedes)
• Update CodeMirror to latest versions #18344 (@krassowski)
• Fix deferred cell loading in defer and contentVisibility windowing mode #18359 (@krassowski)
• Backport PR #18349: Fix "Open With > Editor" for .py files, update @lumino packages to v2026.1.15 #18351 (@krassowski, @aaron-seq)

Maintenance and upkeep improvements

• Fix UI tests: config useSystemClipboardForCells=true for notebook toolbar test #18335 (@brichet)
• Remove generated docs files from the repo #18340 (@jtpio)

Documentation improvements

• Add installation instructions for JupyterLab with uv #18363 (@jimangel)

Contributors to this release

The following people contributed discussions, new ideas, code and documentation contributions, and review.
See our definition of contributors.

(GitHub contributors page for this release)

@aaron-seq (activity) | @brichet (activity) | @IsabelParedes (activity) | @jimangel (activity) | @jtpio (activity) | @krassowski (activity)