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What do you name the callback function?

Derick Bailey on his blog:

JavaScript practically requires callback functions to do anything asynchronous. Unless you’re talking about generators, you really can’t get away from them. Callbacks are everywhere.

I do use different names for the callback parameter, depending on the circumstance. I believe naming is important as it provides a set of expectations. If your code breaks the expectations of the name, people will be confused and it will cause problems.


Freek Van der Herten is a partner and developer at Spatie, an Antwerp based company that specializes in creating web apps with Laravel. After hours he writes about modern PHP and Laravel on this blog. When not coding he’s probably rehearsing with his kraut rock band. He loves waffles and butterflies.