一个简单的深拷贝函数

[chunhuigao]

常用的方式，递归处理对象

function deepCopy(o) {
  if (typeof o === 'object') {
    const type = Object.prototype.toString.call(o);
    switch (type) {
      case '[object Object]':
        const object = {};
        Object.keys(o).forEach((key) => {
          object[key] = deepCopy(o[key]);
        });
        return object;
      case '[object Array]':
        const list = [];
        o.forEach((v, i) => {
          list[i] = deepCopy(v);
        });
        return list;
      case '[object Function]':
        const fn = function () {};
        fn.call(o);
        return fn;
      case '[object Null]':
        return null;
      case '[object Date]':
        return new Date(o);
      default:
        break;
    }
  } else {
    return o;
  }
}