ES6中Object.assign()和Object.create()

Posted 2022-02-07 yangxuan

Object.assign()

语法：Object.assing(target,…sources)

一、合并对象

const first =  name: "Bob" ;
const last =  lastName: "Smith" ;

let person = Object.assign(first, last);
console.log(person);/* name: ‘Bob‘, lastName: ‘Smith‘ */

二、克隆对象

const obj =  person: "Bob Smith";
const clone = Object.assign(, obj);
console.log(obj);/* person: ‘Bob Smith‘ */

三、"null 或 undefined 源被视为空对象一样对待，不会对目标对象产生任何影响。"

const test = null;
const test1 = Object.assign(,test);
console.log(test1);/**/

const test2=undefined;
const test4=Object.assign(,test2);
console.log(test4);/**/

通过以上可以看出，test1和test4依然空对象