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Runtime ownership Calculation engine Adapter lifecycle Error handling

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API contract Formula functions Document operations Compatibility limits Compatibility results Moved guides

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All releases 0.5.1 · 2026-10-18 0.5.0 · 2026-10-17

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All entry points @sheetwrite/core @sheetwrite/formulas @sheetwrite/react @sheetwrite/svelte @sheetwrite/vue @sheetwrite/wasm @sheetwrite/xlsx

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llms.txt llms-full.txt

Documentation
API packages
@sheetwrite/wasm

@sheetwrite/wasm

API reference for @sheetwrite/wasm.

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Documentation

Start

Overview Installation First grid Performance

Understand

Runtime ownership Calculation engine Adapter lifecycle Error handling

Frameworks

Vanilla React Vue Svelte

Build

Configuration Interaction Data operations Host-owned rows Formulas Analysis formulas Styling Persistence Collaboration Worker rendering XLSX export Accessibility

Reference

API contract Formula functions Document operations Compatibility limits Compatibility results Moved guides

Releases

All releases 0.5.1 · 2026-10-18 0.5.0 · 2026-10-17

API packages

All entry points @sheetwrite/core @sheetwrite/formulas @sheetwrite/react @sheetwrite/svelte @sheetwrite/vue @sheetwrite/wasm @sheetwrite/xlsx

Explore Sheetwrite

Home Showcases GitHub

For LLMs

llms.txt llms-full.txt

internal

Internal/transitive entry point; application code normally does not import it directly. Import this entry point as @sheetwrite/wasm.

Declaration target: ./loader.d.ts
Exports: 15

Source entry: packages/wasm/loader.d.ts

Exported symbols

Classes 7

CCellOutResult of a single-cell read. CCellSnapshotResolved values of a sparse coordinate batch, one entry per requested cell. CCellStoreThe workbook-wide store: every sheet, one string pool. CDistinctColumnDistinct-value scan result for one column: parallel kind/number/text arrays whose buffers are surrendered once through the take accessors. CRangeSnapshotOpaque, store-local history payload for one dense rectangular cell block. CSourceSnapshotCompact serializable projection of persisted derived-cell sources and spill identity in one range. CWindowViewA bulk window of resolved cells, row-major over nrows x ncols.

Functions 4

FcreateEngineInitialize a fresh engine; a compiled module can be reused without retaining its memory. FinitSyncInstantiates the given module, which can either be bytes or a precompiled WebAssembly.Module. FisLoadedWhether the WASM module has finished initializing. FloadInitialize the WASM module.

Interfaces 1

IInitOutputResult of module initialization: the instantiated exports plus the shared linear memory.

Types 3

TEngineInstanceEngine objects and caches owned by one independently collectible WASM instance. TInitInputSources accepted by asynchronous initialization: a fetchable URL/request/response, raw module bytes, or a precompiled WebAssembly.Module. TSyncInitInputSources accepted by synchronous initialization: raw module bytes or a precompiled WebAssembly.Module.