It's all about where people draw the line. Personally, I don't think I'd count console.log as "hidden/undisclosed functionality", while I would claim opening a

It's all about where people draw the line. Personally, I don't think I'd count console.log as "hidden/undisclosed functionality", while I would claim opening a browser window is. But some people might, and if I was creating a FOSS library I would not include it. --- EDIT: On second thought, I might consider it functionality: People have application logs that are exposed to customers (so it would cause the company to appear to be taking a stance), or exported to other systems which only understand certain log messages, causing issues there.