1.如何使用构造器?
function Person(name, age) {
this.name = name;
this.age = age;
}
var man = new Person("张三", 50);
2.什么是原型链?
Person.tall = "1.8m"; Person.prototype.sex = "男"; var man1 = new Person("李四", 22); console.log(man1)//person{age: 22,name:'李四'} console.log(man1.tall)//undefined console.log(man1.sex)//男
或方法:
Person.prototype.toString=function(){ return this.name+"已经"+this.age+"岁了"; }; var man1 = new Person("王五", 23); console.log(man1.toString())//王五已经23岁了