sql-wasm.wasm file is not getting loaded correctly when invoked as a web worker

[ghost]

Overview

The responding sql-wasm.wasm file requested by worker.sql-wasm.js doesn't get served correctly and thus leads to a 404 error. I am not sure if that is a bug which is native to next.js though and thus opened an issue there as well. I spend the last two to three days looking into lots of similar issues on github, but none seems to be a viable solution.

Description

I try to invoke a web-worker in one of my pages like this:

/** Add your relevant code here for the issue to reproduce */
export default function Home() {
  const createDb = () => {
    const worker = new Worker(
      new URL('../public/assets/worker.sql-wasm.js', import.meta.url)
    );
    worker.onerror = (e) => console.log('Worker error: ', e);
  };
  return (
    <>
      <h1>Test</h1>
      <br />
      <button
        onClick={() => {
          createDb();
        }}
      >
        Create DB
      </button>
    </>
  );
}

(Please see my reproduction of the problem at Stackblitz)

When doing so I get served a 404 error as the sql-wasm.wasm file can't be find inside the build directory i.e. http://localhost:3000/_next/static/chunks/sql-wasm.wasm.

Question

Is this error due to the nature of the locateFile() function of emscripten or due to a mistake in how I configured the corresponding next.config.js file?

/** @type {import("next").NextConfig} */
const config = {
  reactStrictMode: true,
  webpack: (
    config,
    { buildId, dev, isServer, defaultLoaders, nextRuntime, webpack }
  ) => {
    if (!isServer) {
      config.resolve.fallback.fs = false;
    }
    return config;
  },
};

module.exports = config;

ANY help is much appreciated!

[twoxfh]

https://github.com/WebReflection/sqlite-worker uses sql.js under the hood and abstracts what you want to do in an easy api.

[ghost]

Thanks for the input, but I would like to avoid another layer of abstraction. The current worker of sql.js is (even though it's missing prepared SQL statements) definitely sufficient for what I am trying to achieve.

[sigridjineth]

hope this help you https://github.com/sql-js/sql.js/issues/522