lovecoding
/
class


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 1.Object.is() 判断传入的值 是否全等（===）
        console.log(Object.is(12,12)); //true
        console.log(Object.is(12,"12")); // false
        // 2.Object.assign（） 传入的对象 若属性名相同会覆盖 不同会合并
        let obj1 = {
            name:"孙悟空",
            age:18,
            sex:"男"
        }
        let obj2 = {
            name:"猪八戒",
            age:28
        }
        console.log(Object.assign(obj1,obj2)); 
        let obj3 = {
            name:"唐僧",
            age:38
        };
        let arr = ["北京","上海","哈尔滨"];
        // console.log(Object.setPrototypeOf(obj3,arr));
        // h5 =>  localStorage 中的 setItem 和 getItem
        // 3.Object.setPrototypeOf 自定义对象设置属性
        let newObj = Object.setPrototypeOf(arr,obj3);
        // 4.Object.getPrototypeOf 读取自定义对象属性
        console.log(Object.getPrototypeOf(newObj))

        // es8中新增属性
        let obj4 = {
            name: "图图",
            age:3
        }
        // 5.Object.keys() 当前对象的属性名的键值对
        console.log(Object.keys(obj4),'keys');
        // 6.Object.entries() 返回当前对象中可枚举的键值对
        console.log(Object.entries(obj4),'entries');
        // 7.Object.values() 返回当前对象中可枚举的属性值
        console.log(Object.values(obj4),'values');
        
    </script>
</body>
</html>