esnext.weak-map.emplace.js 276 Bytes Raw Blame History Permalink 1 2 3 4 5 6 7 8 9 'use strict'; var $ = require('../internals/export'); var emplace = require('../internals/map-emplace'); // `WeakMap.prototype.emplace` method // https://github.com/tc39/proposal-upsert $({ target: 'WeakMap', proto: true, real: true, forced: true }, { emplace: emplace });