If i remember right, it was possible to see the result of your coding in result area even if the result was wrong. Now it’s only written what should the coding do.
So i used this to check my coding step by step. Is it possible now ? How to debug the coding ?
You could use a console.log(thingToPrint) statement to print to the javascript console in your browser’s developer tools 
On Chrome, click: view>developer tools> javascript console