import CodeBlock from "@theme/CodeBlock";
import simple_message from "!!raw-loader!../../../../../bindings/nodejs/examples/06_simple_message.js";

The function [`Client.postMessage(message)`](./../libraries/wasm/api_reference#clientpostmessagemessage--promiseany)
accepts a message instance as a parameter and sends it over a network. Alternatively, there is a convenient
[MessageBuilder](./../libraries/wasm/api_reference#messagebuilder) helper class with chaining calls that prepares a
message instance and broadcasts it over the network.

<CodeBlock className="language-javascript">{simple_message}</CodeBlock>

**Output example**:

```string
{
  message: {
    networkId: '14379272398717627559',
    parentMessageIds: [
      '03ddc83fad172a322fb00fb4e449436e9d1117ff390879100647c650a30c2d52',
      '252798210fa9816f6fd40f1b19095da9f2dc88ae06fc4c0523a928a29d0d782e',
      'a8e4f4cd49227068424ead8da187a48fdaa7ce8ffc4b9ac0ee2d5d3f2fcd7e70',
      'dbbc8044bc624b3378e1dda83ab95f9be468b06a6a9806c76a70353182028cf9'
    ],
    payload: null,
    nonce: '9223372036854784215'
  },
  messageId: '10dbee9cf3c58507725861b34ac711058dc13f709be1a6d21f1dc0af17b06379'
}
```

- `messageId` is a unique id that refers to the given message in the network.