Sorry you’re having issues.

I reproduced the example, which you can find hosted here:

https://collaboratescience.com/stack/d3_azle/

Works for me. Make sure it works with your browser. Should look like this:

Here is the code I just wrote on GitHub:

sean-mcclure/d3_azle_change_data

Pull the project and try, or just make sure your code is the same.

If you’re running locally then make sure you start a simple web server to avoid CORS issues. I just use python3 server for simple local work:

python3 -m http.server

Then I can see the app on http://localhost:8000

Let me know if you’re still having issues.