anywidget

reusable widgets made easy

installation . docs . discord . learn

About

anywidget is both a specification and toolkit for authoring reusable web-based widgets for interactive computing environments.

🛠️ create custom Jupyter Widgets without complicated cookiecutter templates
📚 publish to PyPI like any other Python package
🤖 prototype within .ipynb or .py files
🚀 run in Jupyter, JupyterLab, Google Colab, VSCode, marimo and more
⚡ develop with instant HMR, like modern web frameworks

Learn more in the Jupyter blog.

Installation

anywidget is available on PyPI:

pip install "anywidget[dev]"

and also on conda-forge:

conda install -c conda-forge anywidget

Usage

The easiest way to start developing with anywidget is with the Python package.

import anywidget
import traitlets

class CounterWidget(anywidget.AnyWidget):
    # Widget front-end JavaScript code
    _esm = """
    function render({ model, el }) {
      let button = document.createElement("button");
      button.innerHTML = `count is ${model.get("value")}`;
      button.addEventListener("click", () => {
        model.set("value", model.get("value") + 1);
        model.save_changes();
      });
      model.on("change:value", () => {
        button.innerHTML = `count is ${model.get("value")}`;
      });
      el.appendChild(button);
    }
    export default { render };
    """
    # Stateful property that can be accessed by JavaScript & Python
    value = traitlets.Int(0).tag(sync=True)

Front-end code can also live in separate files (recommend):

import pathlib
import anywidget
import traitlets

class CounterWidget(anywidget.AnyWidget):
    _esm = pathlib.Path("index.js")
    _css = pathlib.Path("styles.css")
    value = traitlets.Int(0).tag(sync=True)

Read the documentation to learn more.

Packages

Beyond the primary Python package, anywidget provides an ecosystem of tooling to help you build and distribute custom widgets.

Name	Description	Version (click for changelogs)
`anywidget`	Primary Python package
`npm:@anywidget/types`	Client type declarations
`npm:@anywidget/vite`	Vite plugin
`npm:@anywidget/react`	React framework bridge
`npm:@anywidget/svelte`	Svelte framework bridge
`npm:create-anywidget`	CLI to bootstrap a new project
`jsr:@anywidget/deno`	Backend for Deno Jupyter kernel
`jsr:@anywidget/signals`	Signals bridge

Support

Having trouble? Get help in our Discord or open a Discussion.

Contributing

New contributors welcome! Check out our Contributors Guide for help getting started.

Join us on Discord to meet other maintainers. We'll help you get your first contribution in no time!

Citation

If you use anywidget in your work, please consider citing the following publications:

Our JOSS paper describing the overall project and vision:

@article{manz2024anywidget,
  title = {anywidget: reusable widgets for interactive analysis and visualization in computational notebooks},
  volume = {9},
  url = {https://doi.org/10.21105/joss.06939},
  doi = {10.21105/joss.06939},
  number = {102},
  journal = {Journal of Open Source Software},
  author = {Manz, Trevor and Abdennur, Nezar and Gehlenborg, Nils},
  year = {2024},
  note = {Publisher: The Open Journal},
  pages = {6939},
}

Our SciPy paper, detailing the motivation and approach behind Jupyter Widget ecosystem compatibility:

@inproceedings{manz2024notebooks,
  title = {Any notebook served: authoring and sharing reusable interactive widgets},
  copyright = {https://creativecommons.org/licenses/by/4.0/},
  url = {https://doi.org/10.25080/NRPV2311},
  doi = {10.25080/NRPV2311},
  urldate = {2024-10-07},
  booktitle = {Proceedings of the 23rd {Python} in {Science} {Conference}},
  author = {Manz, Trevor and Gehlenborg, Nils and Abdennur, Nezar},
  month = jul,
  year = {2024},
}

Release files for anywidget 0.11.0

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for anywidget 0.11.0
File	Size	Uploaded
anywidget-0.11.0.tar.gz	427.0 kB	Apr 27, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for anywidget 0.11.0
File	Interpreter	ABI	Platform	Reset
anywidget-0.11.0-py3-none-any.whl 317.3 kB Apr 27, 2026	Python 3	none	any	Details

Total release size: 744.3 kB

Release files / anywidget-0.11.0.tar.gz

Download URL	anywidget-0.11.0.tar.gz
Size	427.0 kB
Tags	Source
SHA-256 checksum How to use checksums	`6695fbef9449cf8c27f421b96c5837aa37f909ec1f60cfa33add333e1b70b169`
BLAKE2b-256 checksum How to use checksums	`79310491d707c674b34267f55d96d6a7148e55e7b6718a271686232cf295fbe2`
Upload date	Apr 27, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.2.0 CPython/3.14.4`

Release files / anywidget-0.11.0-py3-none-any.whl

Download URL	anywidget-0.11.0-py3-none-any.whl
Size	317.3 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`c574d9acc6503ad27b37a9acea48f957a8ba7c9c9876cfcb37898931c098ce9d`
BLAKE2b-256 checksum How to use checksums	`8ec28fec8e8e2eb920cc2280f569144080cd58622a2eda83bfa4c0c354a63264`
Upload date	Apr 27, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.2.0 CPython/3.14.4`