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node_modules/core-js/modules/web.dom-collections.iterator.js

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+'use strict';
+var global = require('../internals/global');
+var DOMIterables = require('../internals/dom-iterables');
+var DOMTokenListPrototype = require('../internals/dom-token-list-prototype');
+var ArrayIteratorMethods = require('../modules/es.array.iterator');
+var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
+var wellKnownSymbol = require('../internals/well-known-symbol');
+
+var ITERATOR = wellKnownSymbol('iterator');
+var TO_STRING_TAG = wellKnownSymbol('toStringTag');
+var ArrayValues = ArrayIteratorMethods.values;
+
+var handlePrototype = function (CollectionPrototype, COLLECTION_NAME) {
+  if (CollectionPrototype) {
+    // some Chrome versions have non-configurable methods on DOMTokenList
+    if (CollectionPrototype[ITERATOR] !== ArrayValues) try {
+      createNonEnumerableProperty(CollectionPrototype, ITERATOR, ArrayValues);
+    } catch (error) {
+      CollectionPrototype[ITERATOR] = ArrayValues;
+    }
+    if (!CollectionPrototype[TO_STRING_TAG]) {
+      createNonEnumerableProperty(CollectionPrototype, TO_STRING_TAG, COLLECTION_NAME);
+    }
+    if (DOMIterables[COLLECTION_NAME]) for (var METHOD_NAME in ArrayIteratorMethods) {
+      // some Chrome versions have non-configurable methods on DOMTokenList
+      if (CollectionPrototype[METHOD_NAME] !== ArrayIteratorMethods[METHOD_NAME]) try {
+        createNonEnumerableProperty(CollectionPrototype, METHOD_NAME, ArrayIteratorMethods[METHOD_NAME]);
+      } catch (error) {
+        CollectionPrototype[METHOD_NAME] = ArrayIteratorMethods[METHOD_NAME];
+      }
+    }
+  }
+};
+
+for (var COLLECTION_NAME in DOMIterables) {
+  handlePrototype(global[COLLECTION_NAME] && global[COLLECTION_NAME].prototype, COLLECTION_NAME);
+}
+
+handlePrototype(DOMTokenListPrototype, 'DOMTokenList');