is

Let's dive into the source code:

https://github.com/sindresorhus/is/blob/d528545e02de3396ea900cd93af478292f0697ee/source/index.ts#L184

Only [Symbol.iterator] property is checked, meaning the value is at least Iterable<T>. It may be IterableIterator<T> if the presence of one more property, next, is ensured.

interface Iterable<T> {
    [Symbol.iterator](): Iterator<T>;
}

is

Here are 526 public repositories matching this topic...

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