codesandbox.io unable to point to anything expcet “index.html”

Question

Trying to setup a vanilla JS on codesandbox.io , when I change the name of the index file, the app no longer can see the HTML at all and throws an error. I must be missing something here, why can I not change the name? In the link here , I have a very basic reproduction of this issue.

Answer 1

The html page can be loaded by navigating to it in the mini browser:

When sharing the sandbox a default url can be configured:

By choosing other options:

and entering the url:

and then sharing it:

The result: https://codesandbox.io/s/agitated-morning-j9fvl?fontsize=14&initialpath=notIndex.html

Answer 2

Apparently there is no way to change the name entry point. It seems that the "index" name is hardcoded in the service code.