How to use WebWorker with ts-node? (without webpack)

Question

Is there any way to use ts-node with WebWorkers but without using webpack?

When I do:

const worker = new Worker('path-to/workerFile.ts', { // ... });

I get:

TypeError [ERR_WORKER_UNSUPPORTED_EXTENSION]: The worker script extension must be ".js" or ".mjs". Received ".ts" at new Worker (internal/worker.js:272:15) // ....

Any ideas?

Tomer

Answer 1

You can make an function to make the magic, using eval property of WorkerOption parameter.

const workerTs = (file: string, wkOpts: WorkerOptions) => {
    wkOpts.eval = true;
    if (!wkOpts.workerData) {
        wkOpts.workerData = {};
    }
    wkOpts.workerData.__filename = file;
    return new Worker(`
            const wk = require('worker_threads');
            require('ts-node').register();
            let file = wk.workerData.__filename;
            delete wk.workerData.__filename;
            require(file);
        `,
        wkOpts
    );
}

so you can create the thread like this:

let wk = workerTs('./file.ts', {});

Hope it can help.