JS浅拷贝
浅拷贝
浅拷贝创建一个新对象，这个对象仅对原对象的属性进行拷贝，属性值是基本类型时，拷贝的是原数据，属性值是引用类型时，拷贝的是指针
实现浅拷贝的几种方法
- Object.assign
let person = { name: 'swt', age: 20 }
let people = Object.assign({}, person)
people.name = 'pty'
console.log(person) // { name: 'swt', age: 20 }
console.log(people) // { name: 'pty', age: 20 }- Array.prototype.concat
let arr = [1, 2, 3]
let newArr = arr.concat()
newArr[0] = 100
console.log(arr) // [ 1, 2, 3 ]
console.log(newArr) // [ 100, 2, 3 ]- Array.prototype.slice
const animals = ["ant", "bison", "camel", "duck", "elephant"]
const newAnimals = animals.slice();
newAnimals[0] = "chicken"
console.log(animals); // [ 'ant', 'bison', 'camel', 'duck', 'elephant' ]
console.log(newAnimals); // [ 'chicken', 'bison', 'camel', 'duck', 'elephant' ]- Spread syntax
const a = [1, 2, 3]
const b = [...a]
b[0] = 4
console.log(a); // [ 1, 2, 3 ]
console.log(b); // [ 4, 2, 3 ]本文参与 腾讯云自媒体同步曝光计划，分享自作者个人站点/博客。
原始发表：2021-10-09，如有侵权请联系 cloudcommunity@tencent.com 删除
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