Step 4: To listen for broadcasted chat messages, go to index.html, and include a script from the socket.io package in the head:

<script src="/socket.io/socket.io.js"></script>

Go to script.js, and add the following near the top:

let socket = io()

The socket object can be used to listen for broadcasted data from the server. To listen for broadcasted chat messages, add the following below getting the chat messages:

socket.on(`message`, showMessage)

The function showMessage will get called when the server broadcasts a message. Add the following at the bottom:

function showMessage(message) {

}

Fill in the function to show the message on the page.