In JavaScript, "wss" refers to the secure WebSocket protocol, which is essentially WebSocket over TLS (Transport Layer Security). It provides an encrypted and more reliable connection between a client (like a web browser) and a server, similar to how HTTPS provides a secure connection over HTTP.
Key aspects of WSS in JavaScript:

   Encryption:
   WSS encrypts the data transmitted between the client and server, preventing eavesdropping and tampering by intermediaries. This is crucial for sensitive data.
   Reliability:
   Because the data is encrypted, proxies and other network devices are less likely to interfere with the connection, leading to a more stable and reliable communication channel.
   Usage with WebSocket API:
   When creating a WebSocket connection in the browser using the WebSocket API, you specify the wss:// protocol in the URL for a secure connection:

JavaScript

   let socket = new WebSocket("wss://your-secure-websocket-server.com");

   Server-side Implementation:
   While the WebSocket API is built into browsers for client-side use, implementing a WSS server typically requires a server-side language and a library that supports secure WebSockets (e.g., the ws library in Node.js, or similar libraries in other languages). The server needs to be configured with SSL/TLS certificates to establish the secure connection.
   Event Handling:
   Once a WSS connection is established, you interact with it in JavaScript using the same event listeners as with a standard ws:// connection:
       onopen: Fired when the connection is established.
       onmessage: Fired when data is received from the server.
       onerror: Fired if an error occurs.
       onclose: Fired when the connection is closed.