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组合式继承.html
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组合式继承.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>将优点为我所有----组合式继承</title>
</head>
<body>
<script>
//声明父类
function ParentClass(name){
// 值类型共有属性
this.name = name
// 引用类型共有属性
this.books = ['html']
}
//父类型原型公有方法
ParentClass.prototype.getName = function(){
console.log(this.name);
}
//声明子类
function ChildClass(name,id){
//构造函数式继承父类name属性
ParentClass.call(this,name);
//子类中新增公有属性
this.id = id;
this.test = '1111'
}
// 类式继承 子类原型继承父类
ChildClass.prototype = new ParentClass();
// 子类原型方法
ChildClass.prototype.getId = function(){
console.log(this.id);
}
ChildClass.prototype.test = '222'
var child1 = new ChildClass('Css',1)
console.log(child1.__proto__, '111', child1)
console.log(child1.test, '我是测试')
child1.books.push('图解Css');
console.log(child1.books) // ['Html','图解Css']
child1.getName() // Css
child1.getId() // 1
var child2 = new ChildClass('Javascript',2)
console.log(child2.books) // ['Html']
child2.getName() // Javascript
child2.getId() // 2
/*
缺点：感觉是不是很复杂？？？？？写法复杂
*/
</script>
</body>
</html>