明天小编持续更新js中对于对象的一些新个性，期待着和大家一起提高。大家还能够关注我的微信公众号，蜗牛全栈。
一、Object.values()：获取对象内值的数组
const obj = { name:"lilei", web:"www.baidu.com", course:"math"}console.log(Object.values(obj)) // ["lilei","www.baidu.com","math"]二、Object.entries()：返回二位数组，每个数组蕴含key和value
const obj = { name:"lilei", web:"www.baidu.com", course:"math"}console.log(Object.entries(obj)) // [["name","lilei"],["web","www.baidu.com"],["course","math"]]console.log(Object.entries(["a","b","c"])) // [["0","a"],["1","b"],["2","c"]]三、循环遍历：与es6中的解构和字符串模板联合
const obj = { name:"lilei", web:"www.baidu.com", course:"math"}for(let [key,val] of Object.entries(obj)){ console.log(`${key}:${val}`) // name:lilei web:www.baidu.com course:math}四、es8之前语法
const obj = { name:"lilei", web:"www.baidu.com", course:"math"}console.log(Object.keys(obj)) // ["name","web","course"]const res = Object.keys(obj).map(key => obj[key])console.log(res) // ["lilei","www.baidu.com","math"]五、Object.getOwnPropertyDescriptors()：获取对象本身属性修饰符
const obj = { name:"lilei", course:"math"}const desc = Object.getOwnPropertyDescriptors(obj)console.log(desc) // {// name:{// value:"lilei", // 默认值// writable:true, // 属性是否能够改// enumerable:true, // 是否能够通过for...in 循环遍历// configurable:true // 是否能够通过delete删除掉// },// course:{// value:"math",// writable:true,// enumerable:true,// configurable:true// }// }六、与Reflect联结应用
const obj= {}Reflect.defineProperty(obj,'name',{ value:"lilei", writable:false, configurable:false, enumerable:true})Reflect.defineProperty(obj,'age',{ value:18, writable:false, configurable:false, enumerable:false})console.log(obj) // {name:"lilei"}obj.name= "zhangsan"console.log(obj) // {name:"lilei"}delete obj.nameconsole.log(obj) // {name:"lilei"}for(let key in obj){ console.log(key) // 只有name。没有age}七、Object.getOwnPropertyDescriptor()
const obj = { name:"lilei", course:"math"}const desc = Object.getOwnPropertyDescriptor(obj,"name")console.log(desc)// {// value:"lilei", // 默认值// writable:true, // 属性是否能够改// enumerable:true, // 是否能够通过for...in 循环遍历// configurable:true // 是否能够通过delete删除掉// }