1、利用JSON对象字符串转换方法(对象中不能有函数，值不能是引用的)。
function deepCopy(ele) {
return JSON.parse(JSON.stringify(ele));
}
const obj = {
a: {
b: [1, [2, [, 3, 4]], { c: 5 }],
},
};
const newObj = deepCopy(obj);
newObj.a.b[2].c = 6;
console.log(newObj.a.b[2].c, obj.a.b[2].c); // 6 52、利用递归遍历的方法
function deepCopy(ele) {
const type = typeof ele;
const baseType = [
"boolean",
"number",
"string",
"undefined",
"function",
];
if (baseType.indexOf(type) > -1 || ele === null) return ele;
const newType = Object.prototype.toString.call(ele);
if (newType === "[object Array]") {
const len = ele.length;
if (!len) return [];
const res = [];
for (let i in ele) {
res.push(deepCopy(ele[i]));
}
return res;
}
if (newType === "[object Object]") {
if (Object.keys(ele).length === 0) return {};
const res = {};
for (let key in ele) {
res[key] = deepCopy(ele[key]);
}
return res;
}
}
const obj = {
a: {
b: [1, [2, [, 3, 4]], { c: 5 }],
},
};
const newObj = deepCopy(obj);
newObj.a.b[2].c = 6;
console.log(newObj.a.b[2].c, obj.a.b[2].c); // 6 5原创文章，作者：投稿专员，如若转载，请注明出处：https://www.506064.com/n/223070.html
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