While in debug mode, the solution explorer has a Script Documents section. It is expanded by default. As the debugger runs, new ScriptDocumentxxx poll.txt
files a
I got annoyed enough with this that I turned off JavaScript debugging. If you are willing to go that far, the scripts are gone.
The path for turn of JS debugging is:
Tools -> Options -> Debugging -> General -> Enable JavaScript debugging for ASP.NET (Chrome, Edge and IE) (Visual Studio 2017 and 2019)
Note: This method does not prevent you from stepping though JS in the Chrome inspection tools so you do not lose that ability. You lose both the scripts (of course) and that new Chrome window that pops up when you launch the debugger.