Uncaught DOMException Failed to execute postMessage on Worker #t could not be cloned

This error occurs when trying to pass a non-cloneable object to a Web Worker using the postMessage() method. The postMessage() method allows you to send data to a Web Worker for processing, but the data needs to be serializable or cloneable.

To fix this error, you can try to pass simple data types like strings, numbers, and booleans instead of complex objects. If you need to pass an object, make sure it is a cloneable object. You can also use structured cloning algorithms like JSON.stringify() and JSON.parse() to serialize and deserialize the data before passing it to the worker.

Here's an example:

// Main thread const obj = { name: "John", age: 30 }; worker.postMessage(JSON.stringify(obj));

// Worker thread onmessage = function(event) { const obj = JSON.parse(event.data); // do something with obj }