create a udp server on a specific port in javascript

To create a UDP server in Node.js, the dgram module can be used. The following code snippet creates a UDP server on a specified port that logs any incoming messages:

index.tsx
const dgram = require('dgram');

// create a UDP server
const server = dgram.createSocket('udp4');

// handle incoming messages
server.on('message', (msg, rinfo) => {
  console.log(`received message from ${rinfo.address}:${rinfo.port}: ${msg}`);
});

// bind server to a port
server.bind(1234, () => {
  console.log('UDP server listening on port 1234');
});
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In the code above, the dgram.createSocket() function is used to create a UDP server. The udp4 parameter specifies that the server should use IPv4. The server.on('message') function listens for incoming messages, and logs them to the console along with the sender's IP address and port. Finally, the server.bind() function binds the server to port 1234, and starts listening for incoming messages.