Are iterators useful in JavaScript?

Publié le: 25 mai 2021
sur la chaîne: Веб-разработка - DevMagazine

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#JavaScript #JS

In this episode, we'll discuss how to make a custom object iterable with for...of. Iterators, or iterable objects, are objects that can be iterated over in a loop. Sometimes it's useful to create a custom iterator for your own objects that aren't iterable by default. This is helpful because it makes working with such objects easier. You simply need to write your own iteration algorithm and return a specific result. To make an object iterable, the object must have a Symbol.iterator field. This field must be a function. The function must return an object with a next field. next is a function that in turn must return an object with value and done fields.

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