What is the best way to debug on the FCC editor?

Right now I am copying my code from JSBin where I can document.write the test lines. Is there a good way to test/debug within the FCC editor itself?

You can open up developer tools (F12) and in your code add console.log("debug message") – for example if you wanted to see the value of some variable.

Chrome Dev Tools will do the trick. That’s what I’m using right now.