Object-oriented in JavaScript

1, the data type in JS
Primitive Type: string, numeric Number, Boolean Boolean, null undefined. Where null means no object, undefined indicates no definition
Arrays Array Object
2. Create objects:
1. Create an object from the New keyword
var obj=new Object ();
Obj.name= "";
obj.age=18;
Obj.todo=function () {}
2. By object literal
2.1 Simple literal
var obj2={};
Obj2.name= "";
Obj2.todo=function () {return this.name;}
2.2 Nested literals (recommended)
var obj3={name: "", Age:18,todo:function () {},run:function () {}}
If there is a space in key or "-" or there is a reserved word keyword need to add quotation marks.
3. The first letter of the constructor constructor must be capitalized
3.1 Constructor mode
function Person (name,age) {
This.name=name;
This.age=age;
This.todo=function () {
return this.age;
}
}

    var person=new Person("",18);    person.name;    person[name];    3.2 工厂模式    function person(name,age){        var obj=new Object();        obj.name=name;        obj.age=age;        return obj;    }    var p=person("冯宝宝",18);    p.name    3.3 普通函数    function person(name){        //this==>指代函数的调用者        return name;    }    person("冯宝宝");4.构造函数与普通函数的区别    4.1 this 指向        构造函数的this指向创建的对象实例上        普遍函数指向函数的调用者    4.2 调用的方式        构造函数需要通过new调用    4.3 命名规则        构造函数第一个字母需要大写

function declarations and function expressions
function Add () {}
var add1=function () {}

Object-oriented in JavaScript