lovecoding
/
web0331


			
				
					
						
						
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    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <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(12, "12"));
      // 2.Object.assign() 对象合并；后面传入的对像若与前面传入的对象属相相同 则覆盖，不同 则合并
      let obj1 = {
        name: 'Lucy',
        age: 10
      }
      let obj2 = {
        name: "LiLi",
        address: "哈尔滨"
      }
      console.log(Object.assign(obj1,obj2))
      let school = {
        address:"长春"
      }
      let city = {
        name:['北京','上海','广州']
      }
      // 3.setPrototypeOf() 给当前对象设置原型 
      console.log(Object.setPrototypeOf(school,city))
      // 4.getPrototypeOf() 获取当前对象设置原型 
      console.log(Object.getPrototypeOf(school))
      // 5.Object.keys
      let obj3 = {
        name: "神厨小福贵",
        age: 12
      }
      // 6.Object.keys() 返回当前可枚举对象的属性名键值对
      console.log(Object.keys(obj3))
      // 7.Object.entries() 返回当前可枚举对象的[key,value]数组
      console.log(Object.entries(obj3))
      // 8.Object.values() 返回当前可枚举对象的属性值键值对
      console.log(Object.values(obj3))
      // 9.Object.getOwnPropertyDescriptor() 返回当前传入对象自身的属性
      console.log(Object.getOwnPropertyDescriptors(obj3)); 
      // 10.Object.create() 对象的创建
      let obj4 = Object.create(null,{
        name:{
            value:"东方树叶",
            configurable: true,
            enumerable: true,
            writable: true
        },
        age:{
            value: 10
        }
      })
      console.log(obj4)
      console.log(Object.getOwnPropertyDescriptors(obj4)); 
    </script>
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