JS对象添加、删除、修改对象的属性

以下是cnblog goweb总结的几种为JS对象添加、删除、修改对象的属性方法，我爱模板网只是把它搬运到了这里：

利用动态特性

function Person(){};
var person = new Person();
person.name = 'yy';
person.gender = 'girl';
console.log(person.name+','+person.gender);//yy,girl
delete person.name;//删除属性
console.log(person.name);//undefined
//变式
function Person(){};
var person = new Person();
person['name'] = 'yy';
person['gender'] = 'girl';
console.log(person.name+','+person.gender);//yy,girl
delete person.name;//删除属性
console.log(person.name);//undefined

构造函数中this

var Person = function (){
    this.name = 'yy';
    this.gender = 'girl'
};
var person = new Person();
console.log(person.name+','+person.gender);//yy,girl

原型中添加属性

var Person = function (){};
Person.prototype.name = 'yy';
Person.prototype.gender = 'girl';
var person = new Person();
console.log(person.name+','+person.gender);//yy,girl
console.log(person['name']+','+person['gender']);//yy,girl

字面量添加属性

var person = {};
person.name = 'yy';
person.gender = 'girl';
console.log(person.name+','+person.gender);//yy,girl
console.log(person['name']+','+person['gender']);//yy,girl
//另一种写法
var person = {
    name: 'yy',
    gender: 'girl'
};
console.log(person.name+','+person.gender);//yy,girl
console.log(person['name']+','+person['gender']);//yy,girl

封装extend方法

var p1 = {};
var p2 = {name:'yy',gender:'girl'};
p1.extend = function(obj){
    for(var k in obj){
        this[k] = obj[k];
    }
}
p1.extend(p2);
console.log(p1.name+','+p1.gender);//yy,girl
console.log(p1['name']+','+p1['gender']);//yy,girl

在此列举了几种对象添加属性的方法，那么对象添加方法也就照猫画虎了