instead of writing JS and HTML code for your app, compile in Android and then test it, this "tremola4chrome" environment enables you to run it inside a Chrome brower tab.
Using Chrome's broadcast feature between tabs, new log entries are sent to all tabs where they are funneled to your JS app logic. See the attached PDFs for details in "/docs" (parts in German).
In order to make use of the chrome environment when developing miniApps, you should start chrome with the --allow-file-access-from-files flag. On windows, this can be done by simultaneously pressing Windows + R and then inputting:
chrome.exe --allow-file-access-from-files
For an overview of the structure of a miniApp, consult the miniApps.md file in the /doc folder