An essential Array.prototype[Symbol.iterator] polyfill for legacy browsers.
npm install @ungap/array-iterator   !WebReflection status
An essential Array Symbol.iterator polyfill for legacy browsers.
* CDN via https://unpkg.com/@ungap/array-iterator
* ESM via import iterator from '@ungap/array-iterator'
* CJS via const iterator = require('@ungap/array-iterator')
Compatible down to IE9, works well with ES5 shim upfront in IE8 (and maybe lower too).