<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>constructorfunctionInherit</title>
<script type="text/javascript">
//声明父类
function superClass(id){
this.id = id;
this.books = [‘html‘,‘css‘,‘js‘];
}
superClass.prototype.getBooks = function(){
console.log(this.books);
}
//声明子类
function subClass(id){
superClass.call(this,id);//让子this指向父this，后面带的是父类需传入的参数id
}
// subClass.prototype.getSubName = function(){
// console.log(this.id);
// }
//实例化对象测试
var test1 = new subClass(1);
var test2 = new subClass(2);
test2.books.push(‘php‘);//test2插入的数据‘php‘不影响test1
console.log(test1.id); //1
console.log(test1.books); //["html", "css", "js"]
console.log(test2.id); //2
console.log(test2.books); //["html", "css", "js", "php"]
//注：构造函数式继承是访问不到父原型链上的属性和方法的
test1.getBooks(); //报错：undefined is not a function
//本例已经通过验证
</script>
</head>
<body>
</body>
</html>