WebSocket demo

The WebSocket API allows you to to maintain a continuous two-way connection between client and server. Messages can be sent and received on both ends.

npm install
npm start
open http://localhost:8080/

Try opening multiple browsers and looking at the logs on client and server. Here's what's happening:

• The client connects to ws://localhost:8081/ via a WebSocket
• The client sends { message: 'Hello' } to the server
• The server sends { message: 'Gotcha '} when a connection is established.
• The server keeps track of all connections in wss.clients
• Every three seconds the server broadcasts { message: 'Hello hello!' } to all connections.
• Connections can be closed by hitting the Close button or closing the window.
• You can send { message: 'Hey' } to the server by hitting Send Message.
• The server sends { message: 'Something changed' } to all connections when a message is received.

Links

• React to data changes
• Writing WebSocket client applications
• Writing WebSocket servers
• WebSocket