I am shure this question is already answered somewhere but I tried to find an solution for more than 3 days already so I just give it a try here.
Actually like it is on freeCodeCamp where it shows me the result of my code in the little window on the left.
Thanks a lot and sry if this was answered already
You can use Visual Studio editor and a plugin called QuokkaJS
Have you tried repl.it?
Thanks Guys now I got it