lovecoding
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VIP32


			
				
					
						
						
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    <title>Document</title>
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    <script>
      // 1.Object.is() 判断两个值是否全等(===)
      console.log(Object.is(12, 12));
      console.log(Object.is(13, "13"));
      // 2.Object.assign() 对象合并；后面传入的对象若于前面传入的对象有相同值得时候 则覆盖，其余的合并
      let obj1 = {
        name: "Lucy",
        age: 12,
      };
      let obj2 = {
        name: "LiLi",
        address: "哈尔滨",
      };
    //   console.log([])
    // console.log({})
      console.log(Object.assign(obj1, obj2));
      console.log({...obj1,...obj2},'合并');
      let school = {
        address: "哈尔滨",
      };
      var city = {
        name: ["北京", "上海", "广州"],
      };
      // 3.Object.setPrototypeOf() 给当前对象原型中设置属性
      console.log(Object.setPrototypeOf(school, city));
      let obj3 = Object.setPrototypeOf(school, city);
      // 4.Object.getPrototypeOf() 获取当前对象中的原型属性
      console.log(Object.getPrototypeOf(school));

      // es8中新增属性
      let obj4 = {
        name: "图图",
        age: 3,
      };
      // 5.Object.keys() 返回当前可枚举对象的属性键值对数组
      console.log(Object.keys(obj4), "keys");
      // 6.Object.entries() 返回当前可枚举对象的[key,value]数组
      console.log(Object.entries(obj4), "entries");
      // 7.Object.values() 返回当前可枚举对象的属性值数组
      console.log(Object.values(obj4), "values");
      // 8.Object.getOwnPropertyDescriptors() 返回当前传入对象的自身属性
      console.log(Object.getOwnPropertyDescriptors(obj4));
      // 9.Object.create() 在原型上去创建一个新对象
      let obj5 = Object.create(
        null,
        {
          name: {
            value: "喜羊羊",
            enumerable: true,
            configurable: true,
            writable: true,
          },
          age: {
            value: 5,
            enumerable: true,
            configurable: true,
            writable: true,
          },
        }
      );
      console.log(obj5);
      console.log(Object.getOwnPropertyDescriptors(obj5));
      let obj6 = {
        vase:[1,2,3,4,5]
      }
      let obj7 = Object.setPrototypeOf(obj5,obj6);
      console.log(obj7);
      console.log(Object.getPrototypeOf(obj7));
    </script>
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