标签:target ons size source font efi 对象产生 define let
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
ES6中Object.assign()和Object.create()
标签:target ons size source font efi 对象产生 define let
原文地址:https://www.cnblogs.com/yangxuan/p/11076199.html