17 lines
562 B
JavaScript
17 lines
562 B
JavaScript
'use strict';
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var aSet = require('../internals/a-set');
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var size = require('../internals/set-size');
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var iterate = require('../internals/set-iterate');
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var getSetRecord = require('../internals/get-set-record');
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// `Set.prototype.isSubsetOf` method
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// https://tc39.es/ecma262/#sec-set.prototype.issubsetof
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module.exports = function isSubsetOf(other) {
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var O = aSet(this);
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var otherRec = getSetRecord(other);
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if (size(O) > otherRec.size) return false;
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return iterate(O, function (e) {
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if (!otherRec.includes(e)) return false;
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}, true) !== false;
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};
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