datasette-vega

A Datasette plugin that provides tools for generating charts using Vega.

The latest release is installed on datasette.io. Try it out with this scatter chart of power plant locations, colored by fuel type.

To add this to your Datasette installation, install the plugin like so:

pip install datasette-vega

The plugin will then add a "Show charting options" button to every Datasette table and SQL query page.

If you are publishing data using the datasette publish command, you can include this plugin like so:

datasette publish cloudrun mydatabase.db --service=my-service --install=datasette-vega

Development

The JavaScript is bundled using esbuild. Install the dependencies and build the plugin's static assets into datasette_vega/static/ like this:

npm install
npm run build

This needs to run before building the Python package, since the bundled assets are not checked into the repository.

To work on the charting interface against the demo page in public/index.html, with automatic rebuilds:

npm run dev

Then open http://localhost:3000/.

To run the Python tests (after npm run build):

uv run pytest