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<>Object.assign()用法
1.Object.assign() 方法用于将所有可枚举属性的值从一个或多个源对象分配到目标对象。它将返回目标对象。
2.Object.assign方法实行的是浅拷贝,而不是深拷贝。目标对象拷贝得到的是这个对象的引用
3.语法:Object.assign(target, …sources)
一、实例1
代码
let aaa = { text: 2, value: 11, } let bbb = { text: 3 } let ccc = Object.assign
(aaa,bbb) // aaa目标对象, bbb源对象 console.log(aaa) console.log(bbb) console.log(ccc)
输出结果
总结:Object.assign()合并对象时,若存在键名相同,值不同,则以合并后的值(ccc)该键的值为源对象(bbb)的值,且目标对象(aaa)的值也改变了
二、实例2
代码
let aaa = { text: 2, value: 11 } let bbb = { text: 3 } let ccc = Object.assign(
bbb,aaa) console.log(aaa) console.log(bbb) console.log(ccc)
输出结果
总结:Object.assign()合并对象时,若存在键名相同,值不同,则以合并后的值(ccc)该键的值为源对象(aaa)的值,且目标对象(bbb)的值也改变了