What is callback function in JavaScript? A function which takes another function as an argument and call that function in itself is known as callback function, in other words when we take a function ...

A callback also known as Higher-order Functions is a function passed as a parameter to another function, then executed inside that function, when specific result is ready. Note that a callback is also ...

Asynchronous code (async code) says: go do something while I do other things, then let me know what happened when the results are ready. Also known as concurrency, async is important in a variety of ...