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一：自有属性

// ----------实例属性，自有属性----------var obj01 = {
   };obj01.name = 'laney';obj01.action = function () {
       console.log('function');}obj01['from'] = '中国';Object.defineProperty(obj01, 'age', {
       configurable: true,    enumerable: true, //可枚举    value: "20",    writable: true});//----------原型继承属性----------var o2 = {
   };o2.x = 1;var p = Object.create(o2);p.__proto__ === o2 //truevar k1 = Object.create(null); //无原型属性var m2 = Object.create(Object.prototype); // m2 = {};var m3 = Object.create(Object.prototype, {
       name: {
           value: 'alice',        configurable: true    }});//----------合并对象属性(新对象)----------var ob01 = {
       name: '122',    age: '10'}var ob02 = {
       age: '20'}var ob03 = {
       run: 'ok'}const copy = Object.assign({
   }, ob01, ob02, ob03); //从右到左合并const copy2 = Object.assign(ob01, ob02, ob03); //从右到左合并//----------删除对象属性----------var onePerson = {
       age: '20',    weight: 50,    name: 'alice'};var otherPerson = Object.create(onePerson);otherPerson.name = 'laney';//删除delete ,只能删除实例属性，不能删除继承属性delete otherPerson.namedelete otherPerson.weight//----------判断属性来源----------var flower = {
       name: '玫瑰',    color: 'red'};var flower02 = Object.create(flower);flower02.size = '20';flower02.from = 'china';Object.defineProperty(flower02, 'age', {
       // configurable: true,    // enumerable: true,    value: "20",    writable: true});'name' in flower02 //true    'size' in flower02 //trueflower02.hasOwnProperty('name') //falseflower02.hasOwnProperty('size') //true//----------可枚举的实例属性----------var keys = Object.keys(flower02); //实例属性 -  可以枚举的var values = Object.values(flower02);//实例属性 - 可以枚举和不可枚举var p2 = Object.getOwnPropertyNames(flower02);//前提是 定义必须可以枚举for (var key in flower02) {
       console.log('------');    console.log(key);    console.log(flower02[key])    // size,from,name,color  - 实例属性 继承    // age  不可枚举 }

二：访问器属性

var man = {
       name: "张三",    age: 24,    color: 'red'};var person1 = JSON.stringify(man); //序列化var person2 = JSON.stringify(man, ["name", "age"]); //过滤var person3 = JSON.stringify(man, ["name", "age"], 8); //格式化var obj = {
   };Object.defineProperty(obj, 'age', {
       configurable: false, //不能删除     writable: true, //能否修改     enumerable: true, //是否可枚举     value: 22});delete obj.age // false 不能删除 obj.age = 30 //true 能修改Object.defineProperties(obj, {
       name: {
           value: 'laney',        writable: true,        enumerable: true,        configurable: true    },    age: {
           configurable: false, //不能删除         writable: false, //能否修改         enumerable: true, //是否可枚举         value: 22    }})obj.age = 30//访问器属性var emp = {
       _name: 'laney',    _age: '20'};Object.defineProperty(emp, 'otherName', {
       enumerable: true,    configuration: true,    get: function () {
           return this._name    }});emp.otherNameemp.otherName = 'alise'; //不能修改， 因为没有set

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