js 深比较好

const original = { a: 1, b: { c: 2 } };
const copy = JSON.parse(JSON.stringify(original));
copy.b.c = 3;
console.log(original.b.c); // 输出 2，原始对象未被修改

function deepCopy(obj) {
  if (obj === null || typeof obj !== 'object') {
    return obj;
  }
  const copy = Array.isArray(obj) ? [] : {};
  for (let key in obj) {
    if (obj.hasOwnProperty(key)) {
      copy[key] = deepCopy(obj[key]);
    }
  }
  return copy;
}

const original = { a: 1, b: { c: 2 } };
const copy = deepCopy(original);
copy.b.c = 3;
console.log(original.b.c); // 输出 2，原始对象未被修改

const _ = require('lodash');
const original = { a: 1, b: { c: 2 } };
const copy = _.cloneDeep(original);
copy.b.c = 3;
console.log(original.b.c); // 输出 2，原始对象未被修改