web.dom-collections.iterator.js 1.7 KB

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  1. 'use strict';
  2. var global = require('../internals/global');
  3. var DOMIterables = require('../internals/dom-iterables');
  4. var DOMTokenListPrototype = require('../internals/dom-token-list-prototype');
  5. var ArrayIteratorMethods = require('../modules/es.array.iterator');
  6. var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
  7. var wellKnownSymbol = require('../internals/well-known-symbol');
  8. var ITERATOR = wellKnownSymbol('iterator');
  9. var TO_STRING_TAG = wellKnownSymbol('toStringTag');
  10. var ArrayValues = ArrayIteratorMethods.values;
  11. var handlePrototype = function (CollectionPrototype, COLLECTION_NAME) {
  12. if (CollectionPrototype) {
  13. // some Chrome versions have non-configurable methods on DOMTokenList
  14. if (CollectionPrototype[ITERATOR] !== ArrayValues) try {
  15. createNonEnumerableProperty(CollectionPrototype, ITERATOR, ArrayValues);
  16. } catch (error) {
  17. CollectionPrototype[ITERATOR] = ArrayValues;
  18. }
  19. if (!CollectionPrototype[TO_STRING_TAG]) {
  20. createNonEnumerableProperty(CollectionPrototype, TO_STRING_TAG, COLLECTION_NAME);
  21. }
  22. if (DOMIterables[COLLECTION_NAME]) for (var METHOD_NAME in ArrayIteratorMethods) {
  23. // some Chrome versions have non-configurable methods on DOMTokenList
  24. if (CollectionPrototype[METHOD_NAME] !== ArrayIteratorMethods[METHOD_NAME]) try {
  25. createNonEnumerableProperty(CollectionPrototype, METHOD_NAME, ArrayIteratorMethods[METHOD_NAME]);
  26. } catch (error) {
  27. CollectionPrototype[METHOD_NAME] = ArrayIteratorMethods[METHOD_NAME];
  28. }
  29. }
  30. }
  31. };
  32. for (var COLLECTION_NAME in DOMIterables) {
  33. handlePrototype(global[COLLECTION_NAME] && global[COLLECTION_NAME].prototype, COLLECTION_NAME);
  34. }
  35. handlePrototype(DOMTokenListPrototype, 'DOMTokenList');