I have a question about \"console.log\" in Javascript Web Office Addins. Currently I am working on Javascript Word Addin
When you say you're not using Visual Studio, do you mean that you're not using the Visual Studio template? Or that you physically don't have Visual Studio on the machine (if so, might I recommend you install it -- even just the free/community edition)?
Once you have that:
You should now get a full debugging experience, complete with console output ("JavaScript console" window; use the Quick Launch (ctrl-Q) to launch it if it doesn't display be default), DOM Explorer (again, use Quick Launch if you don't see it), and more.
~ Michael Zlatkovsky, developer on Office Extensibility team, MSFT