@b32nio/spindle-sheets-core

Core spreadsheet engine for Spindle Sheets. Zero React dependencies.

Features

• Sparse cell storage (Map-based)
• Efficient range operations
• Formula dependency graph
• Style pooling for memory efficiency
• Event system with batching
• TypeScript strict mode

Usage

import { WorkbookImpl } from '@b32nio/spindle-sheets-core';

const workbook = new WorkbookImpl('workbook_1', 'My Workbook');
const sheet = workbook.getSheet();

workbook.setCellValue(undefined, 0, 0, 'Hello');
workbook.setCellValue(undefined, 0, 1, 'World');

Performance

• O(1) cell lookups
• Memory efficient for sparse sheets
• Incremental formula recalculation
• Shared style objects