!function(){function fd(){}; return delete fd;}() 返回true
!function(){function fd(){}; return delete fd;}() ?返回true 求指教
0620yy
2015-08-12
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2019-10-22
delete?操作符會(huì)從某個(gè)對(duì)象上移除指定屬性；如果你試圖刪除的屬性不存在，那么delete將不會(huì)起任何作用，但仍會(huì)返回true
2015-10-31
感嘆號(hào)取反了 換種寫(xiě)法就是true了
(function(){function fd(){}; return delete fd;})()?
2015-10-31
!function(){function fd(){ console.log('1')}; delete fd; fd()}()