diff --git "a/39\351\231\206\345\273\272\351\224\213/2022-11-4\345\216\237\345\236\213\351\223\276\344\270\216\347\273\247\346\211\277/2022_11_04\345\216\237\345\236\213\351\223\276&\347\273\247\346\211\277.html" "b/39\351\231\206\345\273\272\351\224\213/2022-11-4\345\216\237\345\236\213\351\223\276\344\270\216\347\273\247\346\211\277/2022_11_04\345\216\237\345\236\213\351\223\276&\347\273\247\346\211\277.html"
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+构造函数的属性优先于原型上的属性
+ 原型重写
+ 例:
+ function Fun(){};
+ function Fun1(){};
+ Fun.prototype.name = '2'
+ var fun = new Fun();
+ Fun1.prototype = fun
+ var fun1 = new Fun1();
+ Fun1.prototype.name = '3'
+ console.log(fun.name);
+ console.log(fun1.name);
+
+ 原型链 继承:继承父类的属性和方法
+ 原型链继承：会将父级上的所有属性和方法统统继承过来：过多地继承没用的属性
+ function Grand() {} //爷爷
+ function Parent() {} //爸爸
+ function Child(){}//孩子
+ Grand.prototype.tskill = '拉二胡';
+ var grand = new Grand();
+ Parent.prototype = grand;
+ var parent = new Parent();
+ //原型重写
+ Parent.prototype.tskill = '弹琴';
+ console.log(grand.tskill);
+ console.log(parent.tskill);
+
+ 2.构造函数继承:使用call
+ function Parent(name,age){
+ this.name = name; //child.name
+ this.age = age; //child.age
+ }
+
+ function Child(name,age,sex){
+ //call
+ Parent.call(this,name,age);
+ this.sex = sex;
+ }
+ var child = new Child('张三',18,'male');
+ console.log(child.name);
+
+ 3.共享原型继承
+ function Grand(){}
+ Grand.prototype.name = '爷爷';
+
+ function Parent(){
+ }
+ Parent.prototype.name = '爹';
+ Parent.prototype.age = 40;
+
+ function Child(){
+ }
+ //名字是默认的
+ function inherit(Target,Origin){
+ Target.prototype = Origin.prototype;
+ }
+
+ inherit(Child,Parent);
+ Child.prototype.age = 100; //共享
+ var child = new Child();
+ console.log(child.age);
+
+
+
+ 4.圣杯(永恒)模式
+ function Parent() {
+ }
+ Parent.prototype.name = '爹';
+ Parent.prototype.age = 40;
+
+ function Child() {
+ }
+
+ function inherit(Target, Origin) {
+ function F(){} //临时构造函数
+ F.prototype = Origin.prototype;
+ // var f = new F();//实例化:复制一份
+ // Target.prototype = f; //独立的f，里面有父类所有的属性和方法
+ Target.prototype = new F();
+ //归位
+ //构造器归位
+ Target.prototype.constructor = Target;
+ //超类
+ Target.prototype.uber = Origin;
+
+ }
+
+ //Parent.prototype.constructor
+
+
+ inherit(Child, Parent);
+ var child = new Child();
+ console.log(child.__proto__.uber);
+ Child.prototype.name = '张三';
+ // console.log(child.name);
+ // console.log(Child.prototype.constructor);
+ // var parent = new Parent();
+ // console.log();
+ // console.log(parent.name);
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