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27 lines
1.0 KiB
27 lines
1.0 KiB
2 years ago
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'use strict';
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var $ = require('../internals/export');
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var getBuiltIn = require('../internals/get-built-in');
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var call = require('../internals/function-call');
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var aCallable = require('../internals/a-callable');
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var isCallable = require('../internals/is-callable');
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var anObject = require('../internals/an-object');
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var getIterator = require('../internals/get-iterator');
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var iterate = require('../internals/iterate');
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// `Set.prototype.isSubsetOf` method
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// https://tc39.github.io/proposal-set-methods/#Set.prototype.isSubsetOf
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$({ target: 'Set', proto: true, real: true, forced: true }, {
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isSubsetOf: function isSubsetOf(iterable) {
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var iterator = getIterator(this);
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var otherSet = anObject(iterable);
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var hasCheck = otherSet.has;
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if (!isCallable(hasCheck)) {
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otherSet = new (getBuiltIn('Set'))(iterable);
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hasCheck = aCallable(otherSet.has);
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}
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return !iterate(iterator, function (value, stop) {
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if (call(hasCheck, otherSet, value) === false) return stop();
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}, { IS_ITERATOR: true, INTERRUPTED: true }).stopped;
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}
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});
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