function?Background(url,?size){ ????b.style.background?=?url=='w'???'#888786?url(/images/123/123.jpg)?no-repeat'?:?'#888786?url(/images/qwe/qwe.png)?no-repeat?50%?-20%'; ????b.style.backgroundSize?=?size; ????return?true; }? ? ? ? Primitive value returned from constructor will be lost when called with ? ?'new' 更少... ? ?(Ctrl+F1)Checks that function recognized as constructor does not return primitive ? ? ?values. When called with new , this value will be lost and object ? ? ?will be returned instead. To avoid warnings, you can explicitly specify ? ? ?function's return type with @return tag ? ??從構造函數返回原始值將丟失時，稱為'新'更少…（Ctrl?+?f1） 檢查作為構造函數確認的函數不返回原始值。當調用新的，這個值將丟失，對象將返回。為了避免警告，您可以顯式地指定函數返回類型英文翻譯我看不懂。。。