新增 财产备忘本

linwenling

2023-08-08 b3ddacf9a9742276e76c0aa8bfa67fcdd6e1d7fe

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'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
});