--- /dev/null
+'use strict';
+var $ = require('../internals/export');
+var IS_PURE = require('../internals/is-pure');
+var anObject = require('../internals/an-object');
+var getMapIterator = require('../internals/get-map-iterator');
+var sameValueZero = require('../internals/same-value-zero');
+var iterate = require('../internals/iterate');
+
+// `Map.prototype.includes` method
+// https://github.com/tc39/proposal-collection-methods
+$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {
+ includes: function includes(searchElement) {
+ return iterate(getMapIterator(anObject(this)), function (key, value) {
+ if (sameValueZero(value, searchElement)) return iterate.stop();
+ }, undefined, true, true).stopped;
+ }
+});