function C1(name){ if(name) this.name=name;}function C2(name){ this.name=name;}function C3(name){ this.name=name||'john';}//C1.prototype.name="Tom";C2.prototype.name="Tom";C3.prototype.name="Tom";alert((new C1().name)+(new C2().name)+(new C3().name));//我理解的本地name都沒(méi)聲明，訪問(wèn)的都是prototype的name屬性//所以有個(gè)疑問(wèn)就是沒(méi)有聲明的屬性也可以去原型里找嗎//不是應(yīng)該聲明沒(méi)賦值才有用么
面試遇到的一個(gè)問(wèn)題，小白求教關(guān)于原型鏈的
拉莫斯之舞
2018-08-02 13:24:52
