License: UNLICENSED — Not licensed for use; all rights reserved.

preprocess-wasm-bytes

Exports a single function:

preprocess_wasm_bytes(bytes: Uint8Array): Promise<Uint8Array>

It scans the WASM binary (imports/exports/globals/memories/tables/element segments) and produces a new WASM binary with additional exports added for:

• functions referenced by element segments / ref.func in const-exprs
• mutable globals
• all memories
• all tables

Install

npm i preprocess-wasm-bytes

Usage (Node / ESM)
import fs from "node:fs";
import { preprocess_wasm_bytes } from "preprocess-wasm-bytes";

const bytes = new Uint8Array(fs.readFileSync("input.wasm"));
const out = await preprocess_wasm_bytes(bytes);

fs.writeFileSync("output.wasm", out);

Usage (Browser bundlers)
import { preprocess_wasm_bytes } from "preprocess-wasm-bytes";

const res = await fetch("/module.wasm");
const bytes = new Uint8Array(await res.arrayBuffer());
const out = await preprocess_wasm_bytes(bytes);

Debug logging
globalThis.__WASM_PREPROCESS_DEBUG__ = true;


Set that before calling preprocess_wasm_bytes(...).