Logger as an anonymous function.

I think literally every logger let's you log at a certain point as a single line that does not cover the context of the log.

  logger.info('Doing this and that',  function () {
    do_this()
    if(maybe) do_that()
  })

This way you know how much the log comment is supposed to cover as well as take a benchmark on the said context.

I can never think to just add a single line logger anymore.

This is much better than inserting comments in a code as comments can have no context except the line below.

You can add a function like,

logger.comment

and don't let it log anything to be comment syntax replacement.