<!DOCTYPE html> <html> <head> <title></title> </head> <body> </body> <script> var People = function(){ this.name = "Jackey"; }; People.prototype.getName = function(){ return this.name; }; var Man = function(){ this.sex = "male"; People.call(this); }; //缺点 ,name 是父类中的属性,如果修改会影响子类 //Man.prototype = People.prototype; //new 新开内存 Man.prototype = new People(); Man.prototype.constructor = Man;//可随意修改People的属性,不会影响到Man var man = new Man(); console.log(man.getName()); </script> </html>
<!DOCTYPE html> <html> <head> <title></title> </head> <body> </body> <script> var People = function(){ this.name = "Jackey"; }; People.prototype.getName = function(){ return this.name; }; var Man = function(){ this.sex = "male"; People.call(this); }; //缺点 ,name 是父类中的属性,如果修改会影响子类 //Man.prototype = People.prototype; //new 新开内存 Man.prototype = new People(); Man.prototype.constructor = Man;//可随意修改People的属性,不会影响到Man var man = new Man(); console.log(man.getName()); </script> </html>
<!DOCTYPE html> <html> <head> <title></title> </head> <body> </body> <script> var People = function(){ this.name = "Jackey"; }; People.prototype.getName = function(){ return this.name; }; var Man = function(){ this.sex = "male"; People.call(this); }; //缺点 ,name 是父类中的属性,如果修改会影响子类 //Man.prototype = People.prototype; //new 新开内存 Man.prototype = new People(); Man.prototype.constructor = Man;//可随意修改People的属性,不会影响到Man var man = new Man(); console.log(man.getName()); </script> </html>
时间: 2024-10-06 00:07:08