'use strict'; | |
var $ = require('../internals/export'); | |
var IS_PURE = require('../internals/is-pure'); | |
var $upsert = require('../internals/map-upsert'); | |
// `WeakMap.prototype.upsert` method | |
// https://github.com/thumbsupep/proposal-upsert | |
$({ target: 'WeakMap', proto: true, real: true, forced: IS_PURE }, { | |
upsert: $upsert | |
}); |