esnext.map.includes.js 717 B

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  1. 'use strict';
  2. var $ = require('../internals/export');
  3. var IS_PURE = require('../internals/is-pure');
  4. var anObject = require('../internals/an-object');
  5. var getMapIterator = require('../internals/get-map-iterator');
  6. var sameValueZero = require('../internals/same-value-zero');
  7. var iterate = require('../internals/iterate');
  8. // `Map.prototype.includes` method
  9. // https://github.com/tc39/proposal-collection-methods
  10. $({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {
  11. includes: function includes(searchElement) {
  12. return iterate(getMapIterator(anObject(this)), function (key, value) {
  13. if (sameValueZero(value, searchElement)) return iterate.stop();
  14. }, undefined, true, true).stopped;
  15. }
  16. });