JavaScript 实现深拷贝的几种简单方法示例

JSON.parse(JSON.stringify(obj))

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

npm i --save lodash

import {cloneDeep} from 'lodash';

const obj1 = {a: {b: 2}};
const obj2 = cloneDeep(obj1);