Instant WebSockets.
Zero headaches.

// npm install emitra-js
const Emitra = require('emitra-js');

// Client A — subscribes and listens for messages
const receiver = new Emitra('YOUR_APP_KEY');
const channel = receiver.subscribe('my-channel');

channel.on('my-event', (data) => {
    console.log('✅ Received:', data);
    receiver.disconnect();
    sender.disconnect();
});

// Client B — sends a message after both clients connect
const sender = new Emitra('YOUR_APP_KEY');
const senderChannel = sender.subscribe('my-channel');

setTimeout(() => {
    console.log('📤 Sending message...');
    senderChannel.trigger('my-event', { text: 'hello world' });
}, 1500);

Open this HTML file in two browser tabs — type in one tab and see it appear in the other.

<!-- index.html — open in two tabs to see real-time in action -->
<script src="https://cdn.socket.io/4.8.1/socket.io.min.js"></script>
<script src="https://cdn.evnt-flow.com/emitra/v1/emitra.min.js"></script>

<input id="msg" placeholder="Type a message..." />
<button onclick="send()">Send</button>
<ul id="log"></ul>

<script>
const ef = new Emitra('YOUR_APP_KEY');
const channel = ef.subscribe('my-channel');

channel.on('my-event', (data) => {
    document.getElementById('log').innerHTML +=
        `<li>${data.text}</li>`;
});

function send() {
    const text = document.getElementById('msg').value;
    channel.trigger('my-event', { text });
}
</script>

// composer require emitra/emitra-php
require 'vendor/autoload.php';

use Emitra\Emitra;

// Client A — subscribes and listens for messages
$receiver = new Emitra('YOUR_APP_KEY', 'my-channel');

// Client B — sends a message
$sender = new Emitra('YOUR_APP_KEY', 'my-channel');
$sender->trigger('my-event', ['text' => 'hello world']);
$sender->disconnect();

// npm install emitra-js
import Emitra from 'emitra-js';

const ef = new Emitra('YOUR_APP_KEY');
const channel = ef.subscribe('my-channel');

// Listen for incoming messages from OTHER clients
// Note: sender does NOT receive their own messages
channel.on('my-event', (data: any) => {
    console.log('Received:', data);
});

// Send a message — other subscribers will receive it
channel.trigger('my-event', { message: 'hello world' });