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You can create a WebAssembly shared memory instance via the JavaScript API:

const memory = new WebAssembly.Memory({
  initial: 80,
  maximum: 80,
  shared: true
You can then send this memory instance to a Web Worker via postMessage:
const worker = new Worker("worker.js");
worker.postMessage({ memory });
The file worker.js can then create a WebAssembly module using this shared memory instance, allowing it to be shared across module instance in different threads.
For a more complete example, see this blog post:
Faster Fractals with Multi-Threaded WebAssembly
                Thanks a lot! I have written your posts several times and I was interested to talk you about them. In the worker.js can I use some instructions like what we use for SharedArrayBuffer in JS? And I will be grateful if you introduce me a link to talk you.
– user12052616
                Jan 20, 2020 at 9:01
                I want to increment the content of memory from 0 in a infinite loop and read its value in the code whenever I want. And my question is: how to implement this part of code in the worker and how to read it? Thanks.
– user12052616
                Jan 20, 2020 at 9:32
        
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