node socket.io express code example
Example 1: js socket.emit
const socket = io('ws://localhost:3000');
socket.on('connect', () => {
socket.send('Hello!');
socket.emit('salutations', 'Hello!', { 'mr': 'john' }, Uint8Array.from([1, 2, 3, 4]));});
socket.on('message', data => {
console.log(data);
});
socket.on('greetings', (elem1, elem2, elem3) => {
console.log(elem1, elem2, elem3);
});
Example 2: node socket.io send
io.on('connect', onConnect);
function onConnect(socket){
socket.emit('hello', 'can you hear me?', 1, 2, 'abc');
socket.broadcast.emit('broadcast', 'hello friends!');
socket.to('game').emit('nice game', "let's play a game");
socket.to('game1').to('game2').emit('nice game', "let's play a game (too)");
io.in('game').emit('big-announcement', 'the game will start soon');
io.of('myNamespace').emit('bigger-announcement', 'the tournament will start soon');
io.of('myNamespace').to('room').emit('event', 'message');
io.to(`${socketId}`).emit('hey', 'I just met you');
socket.emit('question', 'do you think so?', function (answer) {});
socket.compress(false).emit('uncompressed', "that's rough");
socket.volatile.emit('maybe', 'do you really need it?');
socket.binary(false).emit('what', 'I have no binaries!');
io.local.emit('hi', 'my lovely babies');
io.emit('an event sent to all connected clients');
};