Best of Modern JavaScript — Iterables

Best of Modern JavaScript — Iterables

Properties of iterable objects.JavaScript has various kinds of iterable objects. They include arrays, strings, maps, sets, and NodeLists.

Since 2015, JavaScript has improved immensely.

It’s much more pleasant to use it now than ever.

In this article, we’ll look at JavaScript iterable objects.

Iterable Values

JavaScript has various kinds of iterable objects.

They include arrays, strings, maps, sets, and NodeLists.

Constructs Supporting Iteration

There’re various constructs that make working with iterable objects easier.

One of them is the destructuring syntax.

We can destructure any iterable object entries to variables.

For example, we can write:

const [a, b] = new Set(['a', 'b', 'c']);

Then we assigned 'a' to a and 'b' to b .

The for-of loop lets us iterate through entries in iterable objects easily.

For instance, we can write:

for (const x of ['foo', 'bar', 'baz']) {
  console.log(x);
}

to loop through an array.

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