(论代码的一千种花式玩法)
示例代码:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>私有变量</title>
</head>
<body>
<script>
// 模拟私有变量方式1:
function Person(){
var age = 0; // 私有变量,只能通过getAge和setAge来操作age变量
this.getAge = function(){
return age;
};
this.setAge = function(a){
age = a;
};
}
var p = new Person();
console.log(p.age); // undefined 显然访问不到
console.log(p.getAge()); // 0
p.setAge(18); // 设置age
console.log(p.getAge()); // 18
// 模拟私有变量方式2:(感想:论代码的一千种花式玩法)
function Person1(){
var age = 0;
return {
getAge: function(){
return age;
},
setAge: function(a){
age = a;
}
};
}
var p1 = Person1();
console.log(p1.getAge()); // 0
p1.setAge(18);
console.log(p1.getAge()); // 18
</script>
</body>
</html>