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