Try SmartComments online here.
In any JS source file, press Ctrl+Alt+F (Linux & Windows) to generate comments from current file.
In any JS source file, press Ctrl+Alt+O (Linux & Windows) to generate comments from current directory.
Download the latest source from GitHub and copy the sublime-smartcomments folder to your Sublime Text "Packages" directory.
The "Packages" directory is located at:
- OS X:
~/Library/Application Support/Sublime Text 2/Packages/
%APPDATA%/Sublime Text 2/Packages/