doc: fix worker example to receive message
`require('worker_threads')` is not an instance of `EventEmitter`. So `on` method would not be in it. The correct way to receive the message would be to attach a listener to the `message` event on the `parentPort`. PR-URL: https://github.com/nodejs/node/pull/21486 Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com> Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
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@ -377,7 +377,7 @@ added: v10.5.0
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* `transferList` {Object[]}
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* `transferList` {Object[]}
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Send a message to the worker that will be received via
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Send a message to the worker that will be received via
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[`require('worker_threads').on('message')`][].
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[`require('worker_threads').parentPort.on('message')`][].
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See [`port.postMessage()`][] for more details.
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See [`port.postMessage()`][] for more details.
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### worker.ref()
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### worker.ref()
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@ -480,7 +480,7 @@ active handle in the event system. If the worker is already `unref()`ed calling
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[`process.stdout`]: process.html#process_process_stdout
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[`process.stdout`]: process.html#process_process_stdout
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[`process.title`]: process.html#process_process_title
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[`process.title`]: process.html#process_process_title
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[`require('worker_threads').workerData`]: #worker_threads_worker_workerdata
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[`require('worker_threads').workerData`]: #worker_threads_worker_workerdata
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[`require('worker_threads').on('message')`]: #worker_threads_event_message_1
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[`require('worker_threads').parentPort.on('message')`]: #worker_threads_event_message
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[`require('worker_threads').postMessage()`]: #worker_threads_worker_postmessage_value_transferlist
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[`require('worker_threads').postMessage()`]: #worker_threads_worker_postmessage_value_transferlist
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[`require('worker_threads').isMainThread`]: #worker_threads_worker_ismainthread
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[`require('worker_threads').isMainThread`]: #worker_threads_worker_ismainthread
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[`require('worker_threads').parentPort`]: #worker_threads_worker_parentport
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[`require('worker_threads').parentPort`]: #worker_threads_worker_parentport
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