Install

formulon-cell is the beta spreadsheet UI package used here as the Formulon browser demo host. Install it when you want a desktop-spreadsheet-style browser surface around the @libraz/formulon WASM engine.

npm install @libraz/formulon-cell zustand

zustand is a peer dependency because host applications can read the same store that the built-in chrome subscribes to.

The UI surface is still evolving. Use your package manager lockfile for application reproducibility, and upgrade intentionally when new releases land.

Quick Start

import { Spreadsheet, WorkbookHandle, presets } from '@libraz/formulon-cell'
import '@libraz/formulon-cell/styles.css'

const host = document.getElementById('sheet')!
const workbook = await WorkbookHandle.createDefault()

const sheet = await Spreadsheet.mount(host, {
  workbook,
  features: presets.full(),
  locale: 'en'
})

sheet.i18n.setLocale('ja')
sheet.setTheme('ink')

Runtime Requirement

The Formulon WASM package uses pthreads. Browsers require a cross-origin-isolated page before SharedArrayBuffer is available:

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

Without those headers, formulon-cell falls back to an in-memory stub engine. The UI remains useful for layout and interaction work, but formula evaluation, recalculation, and workbook round-trip behavior are no longer representative of the real engine.