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@@ -0,0 +1,47 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+
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+<head>
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+ <meta charset="UTF-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+</head>
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+
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+<body>
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+ <script>
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+ /**
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+ * 构造函数继承
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+ * 实现：
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+ * 在子类的构造函数中 用call/apply把父类的this指向修改 指向子类的实例
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+ * 优点:
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+ * 父类可以传参
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+ * 父类的引用数据类型 不同享实例
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+ * 缺点：
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+ * 父类原型上的方法 没有被继承
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+ */
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+ function Person(x) {
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+ this.address = x;
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+ this.name = '图图';
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+ this.age = 3;
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+ this.list = ['吃饭', '睡觉', '打豆豆'];
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+ }
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+ Person.prototype.say = function () {
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+ console.log("你好")
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+ }
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+
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+ function Child(val) {
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+ console.log(val,'val')
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+ // Person.call(this,val)
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+ Person.apply(this,[val])
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+ }
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+
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+ let c1 = new Child('北京');
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+ let c2 = new Child('哈尔滨');
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+ c2.list.push("12");
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+ console.log(c1, 'c1', c1.list)
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+ console.log(c2, 'c2', c2.list)
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+ c1.say()
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+ </script>
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+</body>
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+
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+</html>
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zheng