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17 lines
578 B
17 lines
578 B
4 weeks ago
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'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.github.io/proposal-set-methods/#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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