DotNet Core as a whole (C# + F# + other languages that are being ported to compile down to a DotNet binary).
Because it has all the things Java promised us - frictionless, painless, cross-platform programs - but is implementing it far better than Java ever could.
Honestly, DotNet Core is now at least a half-decade or more ahead of Java in terms of the base platform and C# language functionality/ease-of-use. The only advantage Java has at this point is it’s community ecosystem of third-party features and programs.
You may explained it unprecisley or simply wrong. You can not run it in browser. It is done on web Server side like PHP. In browser you run JavaScript.