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- 'use strict';
- var aSet = require('../internals/a-set');
- var size = require('../internals/set-size');
- var iterate = require('../internals/set-iterate');
- var getSetRecord = require('../internals/get-set-record');
- // `Set.prototype.isSubsetOf` method
- // https://tc39.github.io/proposal-set-methods/#Set.prototype.isSubsetOf
- module.exports = function isSubsetOf(other) {
- var O = aSet(this);
- var otherRec = getSetRecord(other);
- if (size(O) > otherRec.size) return false;
- return iterate(O, function (e) {
- if (!otherRec.includes(e)) return false;
- }, true) !== false;
- };
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