本文實例講述了JS 陣列和物件的深拷貝運算。分享給大家供大家參考，具體如下：
let arr = [
undefined,
function(){
console.log(123);
},
true,
null,
{
name:"123",
age:23
}
];
// arr作为拷贝对象Array.from()能將一個類別數組轉換成一個真正的數組，因此它傳回的是一個新數組。
let arr1 = Array.from(arr);
arr[0] = 2;
console.log(arr1);
// [ undefined, [Function], true, null, { name: '123', age: 23 } ]let arr1 = Object.assign([], arr)
arr[0] = 2;
console.log(arr1);
// [ undefined, [Function], true, null, { name: '123', age: 23 } ]此方法也可用作物件的深拷貝
let arr1 = arr.slice(0);
arr[0] = 2;
console.log(arr1);
// [ undefined, [Function], true, null, { name: '123', age: 23 } ]let arr1 = arr.concat();
arr[0] = 2;
console.log(arr1);
// [ undefined, [Function], true, null, { name: '123', age: 23 } ]// let [...arr1] = arr; // 这两种都可以
let arr1 = [...arr];
arr[0] = 2;
console.log(arr1);
// [ undefined, [Function], true, null, { name: '123', age: 23 } ]此方法也可用作物件的深拷貝
let obj = {
name: "a",
age: 20,
sex: false,
user: {
a: 20,
n: "b"
},
f: function(){
return 1;
},
u: undefined,
n: null
}用擴充運算子和Object.assign()方法可以深拷貝物件
let obj1 = Object.assign({}, obj)
obj[age] = 2;
console.log(obj1);
// let obj = { name: "a", age: 20, sex: false,user: {a: 20,n: "b},f: function(){return 1;},u: undefined,n: null}相關學習推薦：javascript影片教學
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