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/* eslint-disable valid-typeof */
var staticStrUndefined = require('./staticStrUndefined')
/**
* 判断是否WeakSet对象
*
* @param {Object} obj 对象
* @return {Boolean}
*/
var supportWeakSet = typeof WeakSet !== staticStrUndefined
function isWeakSet (obj) {
return supportWeakSet && obj instanceof WeakSet
}
module.exports = isWeakSet