查看不到，把dropdown删除了

feige

2023-04-25 5a41d13e34984ca5c20166428759bdafc9beb120

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var global = require('../internals/global');
var isCallable = require('../internals/is-callable');
 
var WeakMap = global.WeakMap;
 
module.exports = isCallable(WeakMap) && /native code/.test(String(WeakMap));