express-ws-example.js

// Get the /ws websocket route
app.ws('/ws', async function(ws, req) {
    ws.on('message', async function(msg) {
        // What was the message?
        console.log(msg);
        // Send back some data
        ws.send(JSON.stringify({
            "append" : true,
            "returnText" : "I am using websockets!"
        }));
    });
});