| 1 | 'use strict';
|
| 2 | var classof = require('../internals/classof');
|
| 3 | var getMethod = require('../internals/get-method');
|
| 4 | var isNullOrUndefined = require('../internals/is-null-or-undefined');
|
| 5 | var Iterators = require('../internals/iterators');
|
| 6 | var wellKnownSymbol = require('../internals/well-known-symbol');
|
| 7 |
|
| 8 | var ITERATOR = wellKnownSymbol('iterator');
|
| 9 |
|
| 10 | module.exports = function (it) {
|
| 11 | if (!isNullOrUndefined(it)) return getMethod(it, ITERATOR)
|
| 12 | || getMethod(it, '@@iterator')
|
| 13 | || Iterators[classof(it)];
|
| 14 | };
|