In Angular, you can upload a file and at the same time get the progress by enabling the reportProgress flag on HttpRequest object. Source code available in Github.
It's very easy to setup asynchronous validation in Angular Form. You can check wheather provided email/date/name etc. already exists in the server with a HTTP call.
updateOn: 'blur' and updateOn: 'submit' are the options we were really craving for while working with Angular Forms. Now it's available out of the box and you don't need any custom implementations.
If you are adding API versioning to your existing API project, you can tell ASP.NET Core to treat the undercoated controllers and actions to have version 1.0 by default. To do that, configure the AddApiVersioning() service with AssumeDefaultVersionNumberUnspecified flag.
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