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@@ -0,0 +1,42 @@
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+<!DOCTYPE html>
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+<html lang="en">
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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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+<body>
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+ <script>
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+ /**
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+ * 所有构造函数下都有两个属性：constructor 和 prototype
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+ * 原型的特点：
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+ * 1.方法 写在原型下
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+ * 2.属性 写在构造函数下
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+ *
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+ */
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+ function Person(name,age) {
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+ this.name = name;
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+ this.age = age;
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+
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+ Person.prototype.eat = function() {
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+ console.log("青草蛋糕")
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+ }
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+ }
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+ let p1 = new Person('LiLi',20);
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+ console.log(p1);
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+ p1.eat();
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+ /**
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+ * 1.令当前子函数的原型 是 当前实例化的父函数
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+ * 2.父对象.call 修改this指向
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+ */
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+ function Child(name,age,a) {
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+ Person.call(this,name,age);
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+ this.a =a;
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+ }
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+ Child.prototype = new Person();
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+ let aa = new Child('HAHA',10,'篮球');
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+ console.log(aa)
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+ aa.eat();
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+ </script>
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+</body>
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+</html>
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