Install

Use the surface that matches where the workbook will run. Formulon packages are pre-1.0: pin exact versions in applications and expect API growth before the first stable release.

Pin versions

Use exact package versions for experiments and internal tooling. Do not float on latest while APIs and packaging are still pre-stable.

JavaScript / WebAssembly

yarn add @libraz/[email protected]

Use this for browsers, workers, and Node-based services that should run the WASM build. The package is ESM-only and requires Node 22 or newer when used in Node.

For browser hosting, configure cross-origin isolation when pthread workers are enabled:

Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Embedder-Policy: require-corp

Python

python -m pip install formulon==0.11.1

Use this for scripts, notebooks, and batch jobs. The wheel ships a standalone Formulon C-ABI WASM module plus a pure-Python wrapper driven through wasmtime; it does not require NumPy, Cython, or pybind11 at runtime.

CLI

Download the platform binary from GitHub Releases when you need a standalone tool for eval, recalc, or workbook inspection workflows.

formulon --version
formulon eval '=SUM(1,2,3)'
formulon recalc input.xlsx -o output.xlsx

formulon-cell

yarn add @libraz/[email protected] @libraz/[email protected]

Install @libraz/formulon-cell-vue when using the Vue adapter. The core package is shared by the framework adapters.

From source

Clone the repository and build the surface you need:

git clone https://github.com/libraz/formulon.git
cd formulon
make build
make test

Packaging commands live in Build from source.