How do you debug in a client-side Blazor application?

To debug a client-side Blazor app in a browser:

1. Close all instances in Chrome.
2. Run the Blazor app in Chrome (version 70 or later).
3. Open Win + R and run the following command.

"%programfiles(x86)%\Google\Chrome\Application\chrome.exe"   --remote-debugging-port=9222 http://localhost:52902/​

• Now the Blazor app is running.
• Then hit Shift+Alt+D on Windows or Linux and Shift+Cmd+D on macOS.

I would suggest you check the below link for better understanding:
https://docs.microsoft.com/en-us/aspnet/core/blazor/debug?view=aspnetcore-3.1