I was searching for software that would help me with JavaScript development (I'm a beginner). I learned most of what I know from Codecademy where they have nifty and very use-full console, I was looking for something similar but that it would be possible to install on my mac (or accessible online).
I guess main usage of such software should be ability to return, print etc.. things of javascript and show error messages to help with debugging purposes. If you have any good suggestions please share it.