Overview

JupyterLab 4.0, released on August 15, 2023, brings real-time collaboration and a faster text editor.

Main Features

Real-time collaboration

Multiple users can edit the same notebook simultaneously thanks to jupyter-collaboration.

python 
# Install collaboration
# pip install jupyter-collaboration

# Start JupyterLab
# jupyter lab

# Other users' cursors are visible in
# real time in the notebook.
# Each user has a distinct color.

CodeMirror 6 editor

The switch to CodeMirror 6 brings a faster editor with better autocompletion and syntax highlighting.

python 
# Improved keyboard shortcuts in JupyterLab 4
#   Ctrl+Shift+C : command palette
#   Tab          : contextual autocompletion
#   Ctrl+D       : multiple selection

# Autocompletion is more responsive
import pandas as pd
df = pd.DataFrame({'a': [1, 2]})
# Typing 'df.' triggers autocompletion

Sources