Testing your Code in a Browser

At this point, your app.js file should look something like this (with a few adjustments):

1. Open the index.html file in your browser by double-clicking on it.
2. Enter some text into the form and send it.
3. You should see the message get added to the message history.

Next, we can test what it looks like if someone else sends a message. While our code is not reachable from the internet, we can simulate that by opening this page in another window.

1. Copy the URL in the address bar of your browser.
2. Open a new window or tab, and paste in the address to open the file.
3. Enter some text into the form and send it.
4. You should see a second message get added to the message history.

Troubleshooting tip: If you cant send and receive messages, open the "console" tab in your browser tools (command+option+i on Mac, CTRL+i on Windows) and check for errors. The most likely issue is that your API key, session ID, or token is not set up properly. Since you hard coded your credentials, it's also possible that your token has expired.