payload-is/lib/esm/iterator.js

A comprehensive TypeScript/JavaScript type checking library providing functions to check data types, collections, primitives, and built-in objects

import { isFunction } from './function.js';
import { isUndefined } from './nil.js';
import { isObject } from './object.js';
import './type.js';

function isIterator(payload) {
  return typeof Iterator !== "undefined" && payload instanceof Iterator || typeof Symbol !== "undefined" && !isUndefined(Symbol.iterator) && isObject(payload) && isFunction(payload[Symbol.iterator]) && payload[Symbol.iterator]() === payload;
}
function isAsyncIterator(payload) {
  return typeof Symbol !== "undefined" && !isUndefined(Symbol.asyncIterator) && isObject(payload) && isFunction(payload[Symbol.asyncIterator]) && payload[Symbol.asyncIterator]() === payload;
}

export { isAsyncIterator, isIterator };
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