Asynchronous programming in JavaScript leverages features like callbacks, promises and async/await to sidestep this issue by allowing other code to run in the meantime.

Using callback-passing for asynchronous actions does not compose well and creates complex flows of passing callbacks around. The JavaScript community has produced several libraries to cope with this.

Asynchronous programming Modern JavaScript is good at asynchronous programming. It’s a good thing, too, because you have to do it a lot.

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This tutorial explains what is different and special about a functional programmer's approach, and demonstrates how to implement JavaScript functions from a functional programming point of view. It ...