Shift + click the item in Outline view to select the related code (function, var...)

It would be nice if we could have a possibility to quickly select the whole functions. In the text editor that I have used it is double-click on the item in the functions panel which allows that.

However, since double-click action in the Outline view is reserved in VSCode for giving focus to the editor, I suggest that you implement Shift+click on the item in the Outline view for selecting the full code of functions. Or, if you do that on the item that represents the definition of var/const, then the line with that definition could be selected.