I have seen this on a newly-generated ASP.NET Core 9 app and in an app I upgraded to .NET 9 from .NET 8.

This is in Views/Shared/_Layout.cshtml:

   <script type="importmap">
      {
        "imports": {
            "axios": "/js/axios.min.js",
            "axios-retry": "/js/axios-retry.js",
            "is-retry-allowed": "/js/is-retry-allowed.js"
        }
      }
   </script>

and it gets stripped out. When I look at the devtools/sources tab in Chrome, it’s there for the .NET 8 app, but not for the .NET 9 app.

How do I stop .NET 9 from doing that?