Typescript: Required callback parameters?

Question

I want to define a function which takes a callback as a parameter, and that callback\'s parameters should be required. Typescript correctly reports a callback with a mismatc

Answer 1

There isn't a way to do this.

Callbacks with fewer parameters than the caller provides are extremely common in JavaScript - functions like forEach, map, filter, etc all provide 3 or more arguments but are frequently given 1-parameter functions as callbacks.