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+// 1.Object.is（） 比较两个值是否严格相等（===）
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+console.log(Object.is(120,120))
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+console.log(Object.is(NaN,NaN))
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+
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+//2.Object.assign() 对象合并:后面的对象会将前一个相同属性覆盖，其余合并
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+let obj1 = {
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+ name:"Lucy",
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+ age:18,
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+ sex: "女"
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+};
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+let obj2 = {
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+ names:'LiLi',
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+ ages: 28
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+}
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+console.log(Object.assign(obj1,obj2));
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+
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+// 3.Object.setPrototypeOf 设置原型对象
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+// 4.Object.getPrototypeOf 获取原型对象
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+const school = {
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+ name:'MySchool'
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+}
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+const city = {
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+ area:['北京','上海','哈尔滨']
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+}
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+Object.setPrototypeOf(school,city);
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+console.log(Object.getPrototypeOf(school),'school')
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+console.log(school)
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+
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+// es8对象扩展方法
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+// 5.Object.keys() 返回给定对象所有可枚举的键值数组
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+var person = {
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+ name:'我的名字',
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+ age: 33
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+}
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+console.log(Object.keys(person),'keys')
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+
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+// 6.Object.values() 返回给定对象所有可枚举的属性值数组
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+console.log(Object.values(person),'values')
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+
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+// 7.Object.entries() 返回给定对象自身可遍历的[key,value]的数组
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+console.log(Object.entries(person),'entires')
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+
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+// 8.Object.getOwnPropertyDescriptors() 返回指定对象所有自身属性的描述对象
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+// 9.Object.create（{},{})
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+console.log(Object.getOwnPropertyDescriptors(person));
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+const obj = Object.create(null,{
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+ name: {
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+ value: '阿珍',
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+ writable: true
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+ },
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+ age: {
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+ value: '40',
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+ writable: false,
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+ configurable:false,
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+ enumerable: false
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+ }
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+})
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+
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+console.log(Object.getOwnPropertyDescriptors(obj));
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