LiveJS

A Jupyter kernel for JavaScript that executes code directly in your web app.

• Use this kernel for quick interactive feedback by running snippets of JavaScript within your web app and viewing the results from Jupyter.
• Written from scratch with the kernel hosted from Python.
• No JavaScript dependencies. No NodeJS.

Note: This project is in very early development and may not have a smooth user experience.

Install

• Install the uv Python package manager

  $ curl -LsSf https://astral.sh/uv/install.sh | sh
  

• Install Jupyter

  $ uv tool install jupyterlab
  $ uv tool install jupyter-core
  

• Install LiveJS

  $ uv tool install git+https://tangled.org/cduck.me/livejs
  

• Install the LiveJS kernel into Jupyter

  $ livejs-install --user
  OR
  $ livejs-install --sys-prefix
  

Usage

• Launch Jupyter

  $ cd my/working/directory
  $ jupyter lab
  

• Within the Jupyter interface, create a new notebook and select the kernel "LiveJS"
• In the first cell, run %serve "path/to/my/webroot", "localhost", 5000
• In the other cells, run JavaScript!
• Advanced: For async Javascript, put the %%async magic at the top of each cell

Demo

demo-video.mp4