Functional JavaScript — Closures

Inner functions are useful.

JavaScript is partly a functional language.

To learn JavaScript, we got to learn the functional parts of JavaScript.

In this article, we’ll look at how to use closures.

Closures

Closures are inner functions.

An inner function is a function within a function.

For example, it’s something like:

function outer() {
  function inner() {}
}

Closures have access to 3 scopes.

They include variables that are declared in its own declaration.

Also, they have access to global variables.

And they have access to an outer function’s variable.

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