老师请问一下,javascript利用空对象作为中介,是如何实现不改变父类原型的属性的啊?
var F = function(){}; F.prototype = Animal.prototype; Cat.prototype = new F(); Cat.prototype.constructor = Cat; alert(Cat.prototype.constructor);//Cat alert(Animal.prototype.constructor);//Animal
var F = function(){}; F.prototype = Animal.prototype; Cat.prototype = new F(); Cat.prototype.constructor = Cat; alert(Cat.prototype.constructor);//Cat alert(Animal.prototype.constructor);//Animal
2015-06-17
举报