node-syncify

Converts async methods to sync using worker_threads. Library related to this blog post. Does not require compilation steps to work, can run anywhere in Node.js, has zero dependencies.

This'll allow you to call async methods as if they were sync, but you have to move the async methods into their own file (and they'll run inside a Worker).

Usage

Currently ESM for now, but could be made CJS. This fork fixes some issue and convert it to CJS module.

Here's a demo which artificially loads a file using the async API of the built-in FS library, but makes those calls sync to the main thread.

In your main file:

// main.js
const build = require('node-syncify');
const method = build(require.resolve('./method.js'));
const result = method('foo.json');

console.info('did something sync!', result);

In your helper file (called "method.js" here), do this:

// method.js
const fs = require('fs').promises;

export default async function(filename) {
  // do something async just for fun
  await new Promise((r) => setTimeout(r, 1000));
  const data = await fs.readFile(filename);
  return data;
};

Great! 🥳