☰ 🦠 Datalayer Cells

A spreadsheet drawn on canvas and exposed as a React component, over a headless model that also runs in Node and in workers. Cells is built on Reactor: every extension point (formula functions, cell types, commands, importers and exporters, data sources, the collaboration provider) is a Reactor contribution point, and the built-in features are Reactor plugins contributing through the same points.

Work in progress.

Formulas: 117 functions, each checked against what LibreOffice computes; the list is in docs/functions.md.

Packages

Python

datalayer_cells reads and writes the same workbooks, with the same validation, for agents and scripts, and adds the datalayer cells command (also datalayer-cells on its own):

from datalayer_cells import Workbook

wb = Workbook.load("budget.cells.json")
wb.read("Summary!A1:C4")            # rows of values
wb.write("B2", [[12, "=B1*2"]])     # formulas are kept as typed
wb.save("budget.cells.json")

datalayer cells show budget.cells.json
datalayer cells get budget.cells.json 'Summary!A1:C4'
datalayer cells set budget.cells.json B2 12 '=B1*2'
datalayer cells export budget.cells.json --format csv

Examples

make examples       # http://127.0.0.1:3077/

A page with a menu of examples, from a few values to collaboration, each with its source. What is not built yet says so, and names the milestone that brings it.

Development

@datalayer/reactor resolves as a package: from npm, or from the workspace in the Datalayer monorepo (install at its root).

npm install
npm run lint        # Prettier and the licence header on every file
npm run typecheck   # everything, tests and examples included
npm test            # unit tests (vitest, two workers), the React tests under React 19 and 18.3
npm run build       # lib/
npm run bench       # Node benches into bench/results/
python -m pytest    # the Python package (pip install -e ".[test]" first)
npm run size        # bundle sizes against their budgets

Browser benches and end-to-end tests run on the system Chrome, headless:

env -u WAYLAND_DISPLAY -u DISPLAY node scripts/bench.mjs --browser

License

MIT, see LICENSE.