src/duck.ts

import * as duckdb from "@duckdb/duckdb-wasm";
import duckdb_wasm from "@duckdb/duckdb-wasm/dist/duckdb-mvp.wasm?url";
import mvp_worker from "@duckdb/duckdb-wasm/dist/duckdb-browser-mvp.worker.js?url";
import duckdb_wasm_eh from "@duckdb/duckdb-wasm/dist/duckdb-eh.wasm?url";
import eh_worker from "@duckdb/duckdb-wasm/dist/duckdb-browser-eh.worker.js?url";

const MANUAL_BUNDLES: duckdb.DuckDBBundles = {
  mvp: {
    mainModule: duckdb_wasm,
    mainWorker: mvp_worker,
  },
  eh: {
    mainModule: duckdb_wasm_eh,
    mainWorker: eh_worker,
  },
};

// https://duckdb.org/docs/api/wasm/instantiation#vite
export const createDb = async () => {
  // Select a bundle based on browser checks
  const bundle = await duckdb.selectBundle(MANUAL_BUNDLES);
  // Instantiate the asynchronus version of DuckDB-wasm
  const worker = new Worker(bundle.mainWorker!);
  const logger = new duckdb.ConsoleLogger();
  const db = new duckdb.AsyncDuckDB(logger, worker);
  await db.instantiate(bundle.mainModule, bundle.pthreadWorker);
  return db;
};

export type DuckDB = typeof duckdb;