How i use node.js worker in nwjs?

[jackieron]

when i use node.js woker in nwjs, there is an error
Uncaught Error: The V8 platform used by this instance of Node does not support creating Workers.

nwjs version is 0.39.2 win x64

[rogerwang]

Could you please provide a full sample (not code snippets) so we can reproduce?

[Dimtime]

Could you please provide a full sample (not code snippets) so we can reproduce?

I have same issue:

const { Worker } = require('worker_threads');
let w = new Worker('./worker.js'); //empty file

[Dimtime]

Seems this problem not only with nwjs...
Electron too: electron/electron#18540
Too bad i hoped use them, while this bug not fixed too: #6477

[rogerwang]

This was fixed in this build: https://dl.nwjs.io/live-build/nw44/20191222-092932/9d6206a45/v0.44.0-beta1/

[rogerwang]

The fix is released in 0.44.0 beta1

[Dimtime]

The fix is released in 0.44.0 beta1

Hm but i dont see how it fixed something...?
Try test code and just get error page:

const { Worker } = require('worker_threads');
let w = new Worker('./worker.js'); //empty file

[rogerwang]

This works for me:
index.html:

<script>
const wt = require('worker_threads');
let w = new wt.Worker('./worker.js');
</script>

worker.js:

const fs=require('fs');
fs.writeFileSync('output.txt', "hello world");

[TheJaredWilcurt]

@rogerwang When attempting to validate this fix I found that NW.js 0.44.0 Beta 1 (SDK) crashes when running the above code.

Reproduction:

• nw7114.zip
• npm install && npm start

Tested in Windows 7 64.

[peq42]

NW.js 0.44.1 still has this problem (tested on windows 10 64 bits)

or well, more specifically, it crashes the application(closing it completly if I try opening the dev tools to check for errors)

[khoshrou]

Hi Roger
I am using NW.js 0.44.1 on windows 10 64 bits with a sample as simple as you provided here
It crashes without any indication about what happened.

[peq42]

@rogerwang any news?

[khoshrou]

Still Waiting ....

[rogerwang]

This is fixed in git and will be available in the next nightly build.

[khoshrou]

I checked simple scenario is working, Thanks

[Dimtime]

I checked simple scenario is working, Thanks

I try check, but have problems...

1. File created, but with big delay
2. I cant get messages

//main
worker.on('message', message => console.log(message));   
//worker
const { parentPort } = require('worker_threads');
parentPort.postMessage('test');  

[khoshrou]

your sample should work, I just tested with roger's sample:

<script>
const wt = require('worker_threads');
let w = new wt.Worker('./worker.js');
</script>

worker.js:

const fs=require('fs');
fs.writeFileSync('output.txt', "hello world");

also tested post message and work data and all work.

[Dimtime]

also tested post message and work data and all work

Thanks for testing, yes it was my mistake... Seems all work
But i have one question and dont know - bug or not (i dont see this in console after):

//worker.js
console.log('test');

[Matt-Maerz]

Hey,
With version 76.1 the app crashes without any errors.
I have used the attached example, just remove the *.txt extension from the files

It is exactly the above example. An HTML and a Server.js is loaded. In the Server.js a WebWorker is called.
The Web Worker writes a txt file with Hello World

index.html.txt
package.json.txt
Server.js.txt
workerFile.js.txt

Can anyone else confirm the behavior, or am I missing something?
Thanks for your time.