is-iterator
v1.0.0 iterator type test
is-iterator
Returns true if an object is an iterator.
Remember that iterators are not the same thing as iterables! This module only checks for the former.
The ECMAScript standard defines an iterator to be an object with a next()
method. To avoid false-positives from objects with next()
methods, this module additionally checks to make sure that the iterator is an iterable that points to itself, since this is a characteristic of built-in iterators.
Installation
npm install is-iterator --save
Usage Example
const isIterator = require('is-iterator')
const array = [] // An array is an iterable, but not by itself an iterator
isIterator(array) // false
isIterator(array[Symbol.iterator]()) // true
npm i [email protected]
Metadata
- MIT
- >=4.0.0
- John Lamansky
- released 12/21/2017