My JavaScript file contains some 10 to 20 functions. I am using Notepad++ and I can fold the code in those functions. But I need an extra tab (or box or window) in the same window I am editing where I can see a list (or tree) with all those functions. So I can click on any function and then to jump with the cursor at the function that I clicked on.
The functions list/tree window should look something similar with the file list in the Atom editor (that tab placed to the left of the editing area)
I don't know if Notepad++ has such a feature but maybe there is some editor capable to do that?
Later edit: I changed the title of the question. I didn't know it's called "Code tree panel"