Hi PILOU
>> In fact we must make our own schema from your example ?

I modified my main.js to have more colors. But, there should be no difference in terms of working.

>> Or there is an original somewhere ?

Actually, I was working on implementing some new features of this "litegragh" fork into the old nodeeditor. But, I haven't released it yet.
https://github.com/atlasan/litegraph.js

It works nice, But, I have some problems with html and css parts.
I was hoping to find someone interested/skilled to help me finish it! :)