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node_modules/core-js/modules/esnext.iterator.from.js

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+'use strict';
+var $ = require('../internals/export');
+var call = require('../internals/function-call');
+var toObject = require('../internals/to-object');
+var isPrototypeOf = require('../internals/object-is-prototype-of');
+var IteratorPrototype = require('../internals/iterators-core').IteratorPrototype;
+var createIteratorProxy = require('../internals/iterator-create-proxy');
+var getIteratorFlattenable = require('../internals/get-iterator-flattenable');
+var IS_PURE = require('../internals/is-pure');
+
+var IteratorProxy = createIteratorProxy(function () {
+  return call(this.next, this.iterator);
+}, true);
+
+// `Iterator.from` method
+// https://github.com/tc39/proposal-iterator-helpers
+$({ target: 'Iterator', stat: true, forced: IS_PURE }, {
+  from: function from(O) {
+    var iteratorRecord = getIteratorFlattenable(typeof O == 'string' ? toObject(O) : O, true);
+    return isPrototypeOf(IteratorPrototype, iteratorRecord.iterator)
+      ? iteratorRecord.iterator
+      : new IteratorProxy(iteratorRecord);
+  }
+});