Introduction to JavaScript Iterators

In the realm of JavaScript, data traversal is a common task. Whether iterating over arrays, strings, or custom data structures, the language provides a powerful mechanism known as iterators . These enable sequential access to elements without exposing the underlying structure, fostering a clean and efficient coding style.

What Are Iterators?

An iterator is an object that adheres to the Iterator Protocol . This protocol requires the object to implement a next() method, which returns an object with two properties:

{ value: any, done: boolean }

The value property contains the current element, while done indicates whether the iteration has completed.

Built-in Iterators in JavaScript

Arrays

Arrays are inherently iterable.…