Discussion on: What JS Logging library / tool do you use?

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Matt G

This code has a weird smell. Can you give me an example of an expensive function call where the only thing you would want to do is log the output in a development environment.

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Stijn de Witt

It is an example. The point is that if you do expensive things to produce the arguments of a log call, the fact that the log function is a no-op does not help with performance. In such cases you need the if. The example is there to demonstrate the if.