Node actually defines multiple log functions corresponding to different log levels, indicating the importance of the message. These are (in order of severity, least to most):
console.debug()
console.info()
console.warn()
console.error()
These are all aliases for console.log()
(console.debug()
and console.info()
) or console.error()
(console.warn()
and console.error()
). They don’t really do anything different, which might lead you to wonder why they exist…
But remember, JavaScript is a dynamic language, so we can re-define the console
object with our own custom implementation that does do something unique with these various versions. But because they exist, they can also be used with the built-in console. This way our code can be compatible with both approaches!