send a binary message to a tcp server in typescript

To send a binary message to a TCP server in TypeScript, you need to create a Buffer object and write your binary data into it. Then, you can send this buffer object to the server using the write() method of the TCP client object. Here's an example:

index.ts
import * as net from 'net';

const binaryData = Buffer.from([0x1A, 0x2B, 0x3C, 0x4D, 0x5E]); // Example binary data
const client = new net.Socket();

client.connect(8080, 'localhost', () => {
  console.log('Connected to server!');
  client.write(binaryData);
});

client.on('data', (data) => {
  console.log('Received data from server:', data);
  client.end(); // Close the connection once we received data
});

client.on('close', () => {
  console.log('Connection closed!');
});
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In this example, we use the built-in net module to create a TCP client, connect to a server running on localhost:8080, and send our binaryData to the server using the write() method of the client object. We also listen for data from the server using the data event, and close the connection once we receive data using the end() method of the client object. Note that in this example, we're sending a Buffer object created with an array of bytes (hexadecimal values). You can create your own Buffer object from different types of data (strings, integers, floats, etc.).