Object Oriented Programming继承

基于原型的继承 例: function Foo(){ this.y=2; } console.log(typeof Foo.prototype); //"Object" Foo.prototype.x=1; var obj3=new Foo(); console.log(obj3.y); //2 console.log(obj3.x); //1 图解： 注意：Object.prototype属性与

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