20 lines
892 B
JavaScript
20 lines
892 B
JavaScript
'use strict';
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var $ = require('../internals/export');
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var toObject = require('../internals/to-object');
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var isPrototypeOf = require('../internals/object-is-prototype-of');
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var getAsyncIteratorFlattenable = require('../internals/get-async-iterator-flattenable');
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var AsyncIteratorPrototype = require('../internals/async-iterator-prototype');
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var WrapAsyncIterator = require('../internals/async-iterator-wrap');
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var IS_PURE = require('../internals/is-pure');
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// `AsyncIterator.from` method
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// https://github.com/tc39/proposal-async-iterator-helpers
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$({ target: 'AsyncIterator', stat: true, forced: IS_PURE }, {
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from: function from(O) {
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var iteratorRecord = getAsyncIteratorFlattenable(typeof O == 'string' ? toObject(O) : O);
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return isPrototypeOf(AsyncIteratorPrototype, iteratorRecord.iterator)
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? iteratorRecord.iterator
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: new WrapAsyncIterator(iteratorRecord);
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}
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});
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