编程: 创建对象的方式(字面量或构造函数)
实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>js中创建对象的方法</title>
<script>
//1. 直接创建对象 ,字面量
let obj1 = { name: 'jimmy', sex:'female',age:18,address:'西安'};
//测试
document.write(obj1.name,obj1.sex,obj1.age,obj1.address);
// 2.利用 Object 创建对象实例
let obj2 = new Object();
obj2.name = 'jimmy';
obj2.sex = 'female';
obj2.age = 18;
obj2.address = 'BeiJing';
//测试
alert(obj2.address);
//3.利用工厂模式函数创建,可以创建多个类似对象
function createStu(name,age) {
let obj3 = new Object();
obj3.name = name;
obj3.age = age;
return obj3;
}
let student1 = new createStu('core',21);
console.log(student1.name +':'+ student1.age);
//4.用构造函数+原型对象模式 创建对象
function Student(name,age) { //构造函数的名字，应首字母大写，以区别普通函数
this.name=name;
this.age=age;
this.friends= ['jimmy','peter'];
}
//把方法写入proto
Student.prototype ={
sayName:function () {
return this.name;
}
};
let student2 = new Student('core',30);
student2.friends.push('zola');
console.log(student2.friends);
console.log(student2.sayName());
</script>
</head>
<body>
</body>
</html>运行实例 »
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