kotlin-node/node.workerThreads/markAsUncloneable

markAsUncloneable

external fun markAsUncloneable(value: Any)(source)

Mark an object as not cloneable. If object is used as message in a port.postMessage() call, an error is thrown. This is a no-op if object is a primitive value.

This has no effect on ArrayBuffer, or any Buffer like objects.

This operation cannot be undone.

const { markAsUncloneable } = require('node:worker_threads');

const anyObject = { foo: 'bar' };
markAsUncloneable(anyObject);
const { port1 } = new MessageChannel();
try {
  // This will throw an error, because anyObject is not cloneable.
  port1.postMessage(anyObject)
} catch (error) {
  // error.name === 'DataCloneError'
}

There is no equivalent to this API in browsers.

Since

v22.10.0