<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>classInherit</title>
<script type="text/javascript">
//声明父类
function superClass(){
this.name = 'Lucy';
}
superClass.prototype.getName = function(){
console.log(this.name);
}
//声明子类
function subClass(){
this.subname = 'Lilei';
this.books = ['html','css','js'];
}
//类式继承
subClass.prototype = new superClass();
//注：一定要先继承，再添加子类原型方法，否则子类的实例调用子类原型方法时会报错：function is not defined
subClass.prototype.getSubName = function(){
console.log(this.subname);
}
//将子类的prototype原型constructor属性的指向修正为subClass子类，否则继承后默认指向了父类的原型上，会出问题
subClass.prototype.constructor = subClass;
//实例化对象测试
var test1 = new subClass();
var test2 = new subClass();
console.log(test1.name); //Lucy
console.log(test1.subname); //Lilei
test1.getName(); //Lucy
test1.getSubName(); //Lilei
// console.log(test1.books);
test1.books.push('php');
console.log(test1.books); //输出：["html", "css", "js", "php"]
console.log(test2.books); //输出：["html", "css", "js"]
// 两个实例之间不会影响
//本例已经通过验证
</script>
</head>
<body>
</body>
</html>
