image.png
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>面向对象</title>
</head>
<body>
<script>
// 类的声明
function Animal() {
this.name = "name";
}
// ES6的类名
class Animal2 {
constructor(){
this.name = name;
}
}
// 实例化
console.log(new Animal, new Animal2)
// 借助构造函数实现继承
function Parent1 () {
this.name = 'parent1';
this.say = function() {}
}
function Child1() {
Parent1.call(this); //apply
this.type = 'Child1';
}
// parent1原型链上的东西并没有被child1继承
Parent1.prototype.say = function(){}
// Parent1的原型对象是Object，Child1上没有继承Object的say方法,
// 这种方法继承不了构造函数原型链上的方法
console.log(new Child1);
// 借助原型链实现继承
function Parent2 () {
this.name = 'parent2';
this.play = [1,2,3]
}
function Child2 () {
this.type = 'child';
}
Child2.prototype = new Parent2();
console.log (new Child2().__proto__);
var s1 = new Child2();
var s2 = new Child2();
s1.play = [1,2,3,4]
console.log(s1.play, s2.play);
</script>
</body>
</html>
赋值.png
赋值.png
push.png
push.png
