Log.error should stringy the error object about loglevel

[pimterry]

Loglevel is intentionally not going to do this: the goal is to be a simple wrapper around console.log to let you control logging levels dynamically from your code, and to make it behave consistently across different platforms (so if something consistently fails everywhere when using console.log, then it should also fail when using loglevel).

You should do whatever you'd normally do when logging with console.log directly.

If you're seeing circular reference issues, that probably means you're using JSON.stringify, which can cause this. That's an issue in your code, see https://stackoverflow.com/questions/11616630/how-can-i-print-a-circular-structure-in-a-json-like-format for more details on how to deal with this. Alternatively, in most environments you can just pass data directly without stringifying it, and console.log on your platform will probably do the sensible thing for you.

As a further option, you could create a plugin to handle this, by automatically stringifying content for you. I generally wouldn't encourage that, but if you'd like to be able to change global behaviour when logging then that's the way to do it: https://github.com/pimterry/loglevel#writing-plugins