1const ws = new WebSocket(\"wss://example.com/socket\");
2ws.onopen = () => {
3    console.log(\"WebSocket connection established!\");
4};
5ws.onmessage = (event) => {
6    console.log(\"Received message: \", event.data);
7};
8ws.onclose = () => {
9    console.log(\"WebSocket connection closed.\");
10};
11ws.onerror = (error) => {
12    console.error(\"WebSocket error:\", error);
13};
14

1ws.onopen = function() {
2    // Connection established
3};
4ws.onmessage = function(event) {
5    // Handle incoming data
6};
7ws.onerror = function(error) {
8    // Handle errors
9};
10ws.onclose = function() {
11    // Cleanup after close
12};
13

1const WebSocket = require(\"ws\");
2const wss = new WebSocket.Server({ port: 8080 });
3wss.on(\"connection\", function connection(ws) {
4  ws.on(\"message\", function incoming(message) {
5    console.log(\"received: %s\", message);
6    ws.send(\"Echo: \" + message);
7  });
8});
9

1// Sending JSON data
2const msg = { type: \"greeting\", payload: \"Hello, server!\" };
3ws.send(JSON.stringify(msg));
4
5// Receiving JSON data
6ws.onmessage = (event) => {
7    const data = JSON.parse(event.data);
8    console.log(\"Received:\", data);
9};
10

1// Sending a binary ArrayBuffer
2const buffer = new ArrayBuffer(8);
3ws.send(buffer);
4

1#include <WebSocketsClient.h>
2WebSocketsClient webSocket;
3
4void setup() {
5  webSocket.begin(\"wss://example.com/socket\");
6  webSocket.onEvent(webSocketEvent);
7}
8
9void webSocketEvent(WStype_t type, uint8_t * payload, size_t length) {
10  if(type == WStype_TEXT) {
11    Serial.printf(\"Received: %s\", payload);
12  }
13}
14
15void loop() {
16  webSocket.loop();
17  // To send a message:
18  webSocket.sendTXT(\"Hello from ESP32!\");
19}
20

1// Using ws library
2wss.on(\"connection\", function connection(ws) {
3  ws.on(\"message\", function incoming(message) {
4    // Broadcast to all clients
5    wss.clients.forEach(function each(client) {
6      if (client.readyState === WebSocket.OPEN) {
7        client.send(message);
8      }
9    });
10  });
11});
12

1function connect() {
2    const ws = new WebSocket(\"wss://example.com/socket\");
3    ws.onclose = () => {
4        setTimeout(connect, 1000); // Reconnect after 1s
5    };
6}
7connect();
8